diff --git a/analyzer/.noserc b/analyzer/.noserc
deleted file mode 100644
index 4f6b377e17..0000000000
--- a/analyzer/.noserc
+++ /dev/null
@@ -1,13 +0,0 @@
-[nosetests]
-
-# increase verbosity level
-verbosity=3
-
-# more detailed error messages on failed asserts
-detailed-errors=1
-
-# stop running tests on first error
-stop=1
-
-# do not capture stdout
-nocapture=1
diff --git a/analyzer/pytest.ini b/analyzer/pytest.ini
new file mode 100644
index 0000000000..7ee6b8962d
--- /dev/null
+++ b/analyzer/pytest.ini
@@ -0,0 +1,13 @@
+[pytest]
+
+addopts =
+# increase verbosity level
+  --verbose
+
+# stop running tests on first error
+# FIXME: Pretty please comment this horrible setting out, I hate it with a
+# passion
+#  --maxfail=1
+
+# do not capture stdout
+  --capture=sys
diff --git a/analyzer/requirements_py/dev/requirements.txt b/analyzer/requirements_py/dev/requirements.txt
index 15b7b9a815..7e69c431d9 100644
--- a/analyzer/requirements_py/dev/requirements.txt
+++ b/analyzer/requirements_py/dev/requirements.txt
@@ -1,5 +1,5 @@
 lxml==4.9.2
-nose==1.3.7
+pytest==7.3.1
 pycodestyle==2.7.0
 psutil==5.8.0
 portalocker==2.2.1
diff --git a/analyzer/tests/Makefile b/analyzer/tests/Makefile
index 21ed55ef5a..24200461e3 100644
--- a/analyzer/tests/Makefile
+++ b/analyzer/tests/Makefile
@@ -6,8 +6,8 @@ PYTHON_BIN ?= python3
 
 REPO_ROOT ?= REPO_ROOT=$(ROOT)
 
-# Nose test runner configuration options.
-NOSECFG = --config .noserc
+# pytest test runner configuration options.
+PYTESTCFG = -c pytest.ini
 
 test_in_env: pycodestyle_in_env pylint_in_env test_unit_in_env test_functional_in_env test_build_logger test_tu_collector_in_env
 
@@ -33,14 +33,14 @@ pylint_in_env: venv_dev
 
 run_test:
 	$(REPO_ROOT) $(TEST_PROJECT) \
-		nosetests $(NOSECFG) ${TEST} || exit 1
+		pytest $(PYTESTCFG) ${TEST} || exit 1
 
 run_test_in_env: venv_dev
 	$(ACTIVATE_DEV_VENV) && $(REPO_ROOT) $(TEST_PROJECT) \
-		nosetests $(NOSECFG) ${TEST} || exit 1
+		pytest $(PYTESTCFG) ${TEST} || exit 1
 
-UNIT_TEST_CMD = $(REPO_ROOT) nosetests $(NOSECFG) tests/unit
-UNIT_TEST_COV_CMD = $(REPO_ROOT) coverage run -m nose $(NOSECFG) tests/unit && coverage report && coverage html
+UNIT_TEST_CMD = $(REPO_ROOT) pytest $(PYTESTCFG) tests/unit
+UNIT_TEST_COV_CMD = $(REPO_ROOT) coverage run -m pytest $(PYTESTCFG) tests/unit && coverage report && coverage html
 
 test_unit:
 	$(UNIT_TEST_CMD)
@@ -55,7 +55,7 @@ test_unit_cov_in_env: venv_dev
 	$(ACTIVATE_DEV_VENV) && $(UNIT_TEST_COV_CMD)
 
 FUNCTIONAL_TEST_CMD = $(REPO_ROOT) $(TEST_PROJECT) \
-		nosetests $(NOSECFG) tests/functional || exit 1
+		pytest $(PYTESTCFG) tests/functional || exit 1
 
 test_functional:
 	${PYTHON_BIN} $(ROOT)/scripts/test/check_clang.py || exit 1;
diff --git a/analyzer/tests/functional/analyze/__init__.py b/analyzer/tests/functional/analyze/__init__.py
index c33e08c325..0b0114f7e4 100644
--- a/analyzer/tests/functional/analyze/__init__.py
+++ b/analyzer/tests/functional/analyze/__init__.py
@@ -7,38 +7,5 @@
 #
 # -------------------------------------------------------------------------
 
-"""Setup for the test package analyze.
-"""
-
-
-import os
-import shutil
-
-from libtest import env
-
-
-# Test workspace should be initialized in this module.
-TEST_WORKSPACE = None
-
-
-def setup_package():
-    """Setup the environment for the tests."""
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = env.get_workspace('analyze')
-
-    report_dir = os.path.join(TEST_WORKSPACE, 'reports')
-    os.makedirs(report_dir)
-
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-
-def teardown_package():
-    """Delete the workspace associated with this test"""
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print("Removing: " + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/analyzer/tests/functional/analyze/test_analyze.py b/analyzer/tests/functional/analyze/test_analyze.py
index c2431d8903..0f19ac8659 100644
--- a/analyzer/tests/functional/analyze/test_analyze.py
+++ b/analyzer/tests/functional/analyze/test_analyze.py
@@ -29,9 +29,26 @@
 class TestAnalyze(unittest.TestCase):
     _ccClient = None
 
-    def setUp(self):
+    def setup_class(self):
+        """Setup the environment for the tests."""
+
+        global TEST_WORKSPACE
+        TEST_WORKSPACE = env.get_workspace('analyze')
+
+        report_dir = os.path.join(TEST_WORKSPACE, 'reports')
+        os.makedirs(report_dir)
+
+        os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
+
+    def teardown_class(self):
+        """Delete the workspace associated with this test"""
+
+        print("Removing: " + TEST_WORKSPACE)
+        shutil.rmtree(TEST_WORKSPACE)
+
+    def setup_method(self, method):
+        """Setup the environment for the tests."""
 
-        # TEST_WORKSPACE is automatically set by test package __init__.py .
         self.test_workspace = os.environ['TEST_WORKSPACE']
 
         test_class = self.__class__.__name__
@@ -51,7 +68,7 @@ def setUp(self):
         self.disabling_modeling_checker_regex = re.compile(
             r"analyzer-disable-checker=.*unix.cstring.CStringModeling.*")
 
-    def tearDown(self):
+    def teardown_method(self, method):
         """Restore environment after tests have ran."""
         os.chdir(self.__old_pwd)
         if os.path.isdir(self.report_dir):
@@ -1105,11 +1122,9 @@ def test_analyzer_and_checker_config(self):
 
         # It's printed as a found report and in the checker statistics.
         # Note: If this test case fails, its pretty sure that something totally
-        # unrelated to the analysis broke in CodeChecker. Comment out the line
-        # starting with 'nocapture' in 'analyzer/.noserc', and print both the
+        # unrelated to the analysis broke in CodeChecker. Print both the
         # stdout and stderr streams from the above communicate() call (the
-        # latter of which is ignored with _ above)
-        # Put a + if the above instructions saved you: +
+        # latter of which is ignored with _ above).
         self.assertEqual(out.count('hicpp-use-nullptr'), 2)
 
         analyze_cmd = [self._codechecker_cmd, "check", "-l", build_json,
diff --git a/analyzer/tests/functional/analyze_and_parse/__init__.py b/analyzer/tests/functional/analyze_and_parse/__init__.py
index 5931487568..0b0114f7e4 100644
--- a/analyzer/tests/functional/analyze_and_parse/__init__.py
+++ b/analyzer/tests/functional/analyze_and_parse/__init__.py
@@ -7,32 +7,5 @@
 #
 # -------------------------------------------------------------------------
 
-"""Setup for the test package 'analyze' and 'parse'."""
-
-
-import os
-import shutil
-
-from libtest import env
-
-TEST_WORKSPACE = None
-
-
-def setup_package():
-    """Setup the environment for the tests."""
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = env.get_workspace('analyze_and_parse')
-
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-
-def teardown_package():
-    """Delete the workspace associated with this test"""
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print("Removing: " + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/analyzer/tests/functional/analyze_and_parse/test_analyze_and_parse.py b/analyzer/tests/functional/analyze_and_parse/test_analyze_and_parse.py
index e8a06efa5d..3ad7890b2b 100644
--- a/analyzer/tests/functional/analyze_and_parse/test_analyze_and_parse.py
+++ b/analyzer/tests/functional/analyze_and_parse/test_analyze_and_parse.py
@@ -30,6 +30,7 @@
 
 
 class AnalyzeParseTestCaseMeta(type):
+
     def __new__(mcs, name, bases, test_dict):
 
         def gen_test(path, mode):
@@ -64,7 +65,11 @@ class AnalyzeParseTestCase(
     def setup_class(cls):
         """Setup the class."""
 
-        # TEST_WORKSPACE is automatically set by test package __init__.py
+        global TEST_WORKSPACE
+        TEST_WORKSPACE = env.get_workspace('analyze_and_parse')
+
+        os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
+
         test_workspace = os.environ['TEST_WORKSPACE']
         cls.test_workspaces = {'NORMAL': os.path.join(test_workspace,
                                                       'NORMAL'),
@@ -108,7 +113,14 @@ def teardown_class(cls):
         """Restore environment after tests have ran."""
         os.chdir(cls.__old_pwd)
 
-    def tearDown(self):
+        # TODO: If environment variable is set keep the workspace
+        # and print out the path.
+        global TEST_WORKSPACE
+
+        print("Removing: " + TEST_WORKSPACE)
+        shutil.rmtree(TEST_WORKSPACE)
+
+    def teardown_method(self, method):
         """Restore environment after a particular test has run."""
         output_dir = AnalyzeParseTestCase.test_workspaces['OUTPUT']
         if os.path.isdir(output_dir):
diff --git a/analyzer/tests/functional/cmdline/__init__.py b/analyzer/tests/functional/cmdline/__init__.py
index 4d7ca0c381..0b0114f7e4 100644
--- a/analyzer/tests/functional/cmdline/__init__.py
+++ b/analyzer/tests/functional/cmdline/__init__.py
@@ -7,35 +7,5 @@
 #
 # -------------------------------------------------------------------------
 
-"""Setup for the test package analyze.
-"""
-
-
-import os
-import shutil
-
-from libtest import env
-
-
-# Test workspace should be initialized in this module.
-TEST_WORKSPACE = None
-
-
-def setup_package():
-    """Setup the environment for the tests."""
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = env.get_workspace('cmdline')
-
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-
-def teardown_package():
-    """Delete the workspace associated with this test"""
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print("Removing: " + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/analyzer/tests/functional/cmdline/test_cmdline.py b/analyzer/tests/functional/cmdline/test_cmdline.py
index ad944835a3..a3408dd131 100644
--- a/analyzer/tests/functional/cmdline/test_cmdline.py
+++ b/analyzer/tests/functional/cmdline/test_cmdline.py
@@ -12,6 +12,7 @@
 
 import json
 import os
+import shutil
 import subprocess
 import unittest
 
@@ -38,7 +39,25 @@ class TestCmdline(unittest.TestCase):
     Simple tests to check CodeChecker command line.
     """
 
-    def setUp(self):
+    def setup_class(self):
+        """Setup the environment for the tests."""
+
+        global TEST_WORKSPACE
+        TEST_WORKSPACE = env.get_workspace('cmdline')
+
+        os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
+
+    def teardown_class(self):
+        """Delete the workspace associated with this test"""
+
+        # TODO: If environment variable is set keep the workspace
+        # and print out the path.
+        global TEST_WORKSPACE
+
+        print("Removing: " + TEST_WORKSPACE)
+        shutil.rmtree(TEST_WORKSPACE)
+
+    def setup_method(self, method):
         # TEST_WORKSPACE is automatically set by test package __init__.py .
         self.test_workspace = os.environ['TEST_WORKSPACE']
 
diff --git a/analyzer/tests/functional/config/__init__.py b/analyzer/tests/functional/config/__init__.py
index 365c4c6ffc..0b0114f7e4 100644
--- a/analyzer/tests/functional/config/__init__.py
+++ b/analyzer/tests/functional/config/__init__.py
@@ -7,35 +7,5 @@
 #
 # -------------------------------------------------------------------------
 
-"""Setup for the config test for the analyze command.
-"""
-
-
-import os
-import shutil
-
-from libtest import env
-
-
-# Test workspace should be initialized in this module.
-TEST_WORKSPACE = None
-
-
-def setup_package():
-    """Setup the environment for the tests."""
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = env.get_workspace('config')
-
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-
-def teardown_package():
-    """Delete the workspace associated with this test"""
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print("Removing: " + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/analyzer/tests/functional/config/test_config.py b/analyzer/tests/functional/config/test_config.py
index b353f6536c..9bd9feac35 100644
--- a/analyzer/tests/functional/config/test_config.py
+++ b/analyzer/tests/functional/config/test_config.py
@@ -14,6 +14,7 @@
 
 import json
 import os
+import shutil
 import subprocess
 import unittest
 
@@ -23,7 +24,25 @@
 class TestConfig(unittest.TestCase):
     _ccClient = None
 
-    def setUp(self):
+    def setup_class(self):
+        """Setup the environment for the tests."""
+
+        global TEST_WORKSPACE
+        TEST_WORKSPACE = env.get_workspace('config')
+
+        os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
+
+    def teardown_class(self):
+        """Delete the workspace associated with this test"""
+
+        # TODO: If environment variable is set keep the workspace
+        # and print out the path.
+        global TEST_WORKSPACE
+
+        print("Removing: " + TEST_WORKSPACE)
+        shutil.rmtree(TEST_WORKSPACE)
+
+    def setup_method(self, method):
 
         # TEST_WORKSPACE is automatically set by test package __init__.py .
         self.test_workspace = os.environ['TEST_WORKSPACE']
diff --git a/analyzer/tests/functional/ctu/__init__.py b/analyzer/tests/functional/ctu/__init__.py
index 01ffe6dbef..0b0114f7e4 100644
--- a/analyzer/tests/functional/ctu/__init__.py
+++ b/analyzer/tests/functional/ctu/__init__.py
@@ -7,34 +7,5 @@
 #
 # -------------------------------------------------------------------------
 
-"""Setup for the test package ctu."""
-
-
-import os
-import shutil
-
-from libtest import env
-
-# Test workspace should be initialized in this module.
-TEST_WORKSPACE = None
-
-
-def setup_package():
-    """Setup the environment for testing ctu."""
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = env.get_workspace('ctu')
-
-    # Set the TEST_WORKSPACE used by the tests.
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-
-def teardown_package():
-    """Delete workspace."""
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print('Removing: ' + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/analyzer/tests/functional/ctu/test_ctu.py b/analyzer/tests/functional/ctu/test_ctu.py
index 89c6eef24e..cfd2d44479 100644
--- a/analyzer/tests/functional/ctu/test_ctu.py
+++ b/analyzer/tests/functional/ctu/test_ctu.py
@@ -35,14 +35,33 @@
 class TestCtu(unittest.TestCase):
     """ Test CTU functionality. """
 
-    def setUp(self):
+    def setup_class(self):
+        """Setup the environment for testing ctu."""
+
+        global TEST_WORKSPACE
+        TEST_WORKSPACE = env.get_workspace('ctu')
+
+        # Set the TEST_WORKSPACE used by the tests.
+        os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
+
+    def teardown_class(self):
+        """Delete workspace."""
+
+        # TODO: If environment variable is set keep the workspace
+        # and print out the path.
+        global TEST_WORKSPACE
+
+        print('Removing: ' + TEST_WORKSPACE)
+        shutil.rmtree(TEST_WORKSPACE)
+
+    def setup_method(self, method):
         """ Set up workspace."""
         self.setUpWith('test_files_c', 'buildlog.json', 'reports_c')
 
     def setUpWith(self, input_dir, buildlog_json, report_dir):
         """
         Set up workspace with a given parameters. If called multiple times,
-        tearDown() must be called before this function.
+        teardown_method() must be called before this function.
         """
         # TEST_WORKSPACE is automatically set by test package __init__.py .
         self.test_workspace = os.environ['TEST_WORKSPACE']
@@ -78,7 +97,7 @@ def setUpWith(self, input_dir, buildlog_json, report_dir):
         self.__old_pwd = os.getcwd()
         os.chdir(self.test_workspace)
 
-    def tearDown(self):
+    def teardown_method(self, method):
         """ Tear down workspace."""
 
         shutil.rmtree(self.report_dir, ignore_errors=True)
@@ -201,7 +220,7 @@ def __test_ctu_analyze(self, on_demand=False):
     def __test_ctu_analyze_cpp(self, on_demand=False):
         """ Test CTU analyze phase. """
 
-        self.tearDown()
+        self.teardown_method(self.__test_ctu_analyze_cpp)
         self.setUpWith('test_files_cpp', 'buildlog.json', 'reports_cpp')
 
         self.__do_ctu_collect(on_demand=on_demand)
@@ -366,7 +385,7 @@ def test_ctu_ondemand_yaml_format(self):
         The YAML file should not contain newlines in individual entries in the
         generated textual format. """
 
-        self.tearDown()
+        self.teardown_method(self.test_ctu_ondemand_yaml_format)
         self.setUpWith('test_files_c', 'complex_buildlog.json', 'reports_c')
 
         # Copy test files to a directory which file path will be longer than
diff --git a/analyzer/tests/functional/ctu_failure/__init__.py b/analyzer/tests/functional/ctu_failure/__init__.py
index b3c1c4bf36..0b0114f7e4 100644
--- a/analyzer/tests/functional/ctu_failure/__init__.py
+++ b/analyzer/tests/functional/ctu_failure/__init__.py
@@ -7,34 +7,5 @@
 #
 # -------------------------------------------------------------------------
 
-"""Setup for the test package ctu."""
-
-
-import os
-import shutil
-
-from libtest import env
-
-# Test workspace should be initialized in this module.
-TEST_WORKSPACE = None
-
-
-def setup_package():
-    """Setup the environment for testing ctu."""
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = env.get_workspace('ctu_failure')
-
-    # Set the TEST_WORKSPACE used by the tests.
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-
-def teardown_package():
-    """Delete workspace."""
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print('Removing: ' + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/analyzer/tests/functional/ctu_failure/test_ctu_failure.py b/analyzer/tests/functional/ctu_failure/test_ctu_failure.py
index 542ca2785d..98a5a13a35 100644
--- a/analyzer/tests/functional/ctu_failure/test_ctu_failure.py
+++ b/analyzer/tests/functional/ctu_failure/test_ctu_failure.py
@@ -36,7 +36,26 @@
 class TestCtuFailure(unittest.TestCase):
     """ Test CTU functionality. """
 
-    def setUp(self):
+    def setup_class(self):
+        """Setup the environment for testing ctu."""
+
+        global TEST_WORKSPACE
+        TEST_WORKSPACE = env.get_workspace('ctu_failure')
+
+        # Set the TEST_WORKSPACE used by the tests.
+        os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
+
+    def teardown_class(self):
+        """Delete workspace."""
+
+        # TODO: If environment variable is set keep the workspace
+        # and print out the path.
+        global TEST_WORKSPACE
+
+        print('Removing: ' + TEST_WORKSPACE)
+        shutil.rmtree(TEST_WORKSPACE)
+
+    def setup_method(self, method):
         """ Set up workspace."""
 
         # TEST_WORKSPACE is automatically set by test package __init__.py .
@@ -91,7 +110,7 @@ def __set_up_test_dir(self, project_path):
                   encoding="utf-8", errors="ignore") as log_file:
             json.dump(build_json, log_file)
 
-    def tearDown(self):
+    def teardown_method(self, method):
         """ Tear down workspace."""
 
         shutil.rmtree(self.report_dir, ignore_errors=True)
diff --git a/analyzer/tests/functional/fixit/__init__.py b/analyzer/tests/functional/fixit/__init__.py
index 93c2d9edbc..0b0114f7e4 100644
--- a/analyzer/tests/functional/fixit/__init__.py
+++ b/analyzer/tests/functional/fixit/__init__.py
@@ -7,38 +7,5 @@
 #
 # -------------------------------------------------------------------------
 
-"""Setup for the test package fixit.
-"""
-
-
-import os
-import shutil
-
-from libtest import env
-
-
-# Test workspace should be initialized in this module.
-TEST_WORKSPACE = None
-
-
-def setup_package():
-    """Setup the environment for the tests."""
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = env.get_workspace('fixit')
-
-    report_dir = os.path.join(TEST_WORKSPACE, 'reports')
-    os.makedirs(report_dir)
-
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-
-def teardown_package():
-    """Delete the workspace associated with this test"""
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print("Removing: " + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/analyzer/tests/functional/fixit/test_fixit.py b/analyzer/tests/functional/fixit/test_fixit.py
index 8e71951ed7..b98e0ff2c9 100644
--- a/analyzer/tests/functional/fixit/test_fixit.py
+++ b/analyzer/tests/functional/fixit/test_fixit.py
@@ -29,7 +29,28 @@
 class TestFixit(unittest.TestCase):
     _ccClient = None
 
-    def setUp(self):
+    def setup_class(self):
+        """Setup the environment for the tests."""
+
+        global TEST_WORKSPACE
+        TEST_WORKSPACE = env.get_workspace('fixit')
+
+        report_dir = os.path.join(TEST_WORKSPACE, 'reports')
+        os.makedirs(report_dir)
+
+        os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
+
+    def teardown_class(self):
+        """Delete the workspace associated with this test"""
+
+        # TODO: If environment variable is set keep the workspace
+        # and print out the path.
+        global TEST_WORKSPACE
+
+        print("Removing: " + TEST_WORKSPACE)
+        shutil.rmtree(TEST_WORKSPACE)
+
+    def setup_method(self, method):
 
         # TEST_WORKSPACE is automatically set by test package __init__.py .
         self.test_workspace = os.environ['TEST_WORKSPACE']
@@ -43,7 +64,7 @@ def setUp(self):
         # Change working dir to testfile dir so CodeChecker can be run easily.
         self.__old_pwd = os.getcwd()
 
-    def tearDown(self):
+    def teardown_method(self, method):
         """Restore environment after tests have run."""
         os.chdir(self.__old_pwd)
         if os.path.isdir(self.report_dir):
diff --git a/analyzer/tests/functional/host_check/__init__.py b/analyzer/tests/functional/host_check/__init__.py
index c24b816e8b..0b0114f7e4 100644
--- a/analyzer/tests/functional/host_check/__init__.py
+++ b/analyzer/tests/functional/host_check/__init__.py
@@ -7,10 +7,5 @@
 #
 # -------------------------------------------------------------------------
 
-
-def setup_package():
-    pass
-
-
-def teardown_package():
-    pass
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/analyzer/tests/functional/skip/__init__.py b/analyzer/tests/functional/skip/__init__.py
index 074d4e00af..0b0114f7e4 100644
--- a/analyzer/tests/functional/skip/__init__.py
+++ b/analyzer/tests/functional/skip/__init__.py
@@ -7,38 +7,5 @@
 #
 # -------------------------------------------------------------------------
 
-"""Setup for the skip test for the analyze command.
-"""
-
-
-import os
-import shutil
-
-from libtest import env
-
-
-# Test workspace should be initialized in this module.
-TEST_WORKSPACE = None
-
-
-def setup_package():
-    """Setup the environment for the tests."""
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = env.get_workspace('skip')
-
-    report_dir = os.path.join(TEST_WORKSPACE, 'reports')
-    os.makedirs(report_dir)
-
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-
-def teardown_package():
-    """Delete the workspace associated with this test"""
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print("Removing: " + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/analyzer/tests/functional/skip/test_skip.py b/analyzer/tests/functional/skip/test_skip.py
index 7f41848ce5..48dc777cd6 100644
--- a/analyzer/tests/functional/skip/test_skip.py
+++ b/analyzer/tests/functional/skip/test_skip.py
@@ -17,6 +17,7 @@
 import os
 import plistlib
 import shlex
+import shutil
 import subprocess
 import tempfile
 import unittest
@@ -27,7 +28,28 @@
 class TestSkip(unittest.TestCase):
     _ccClient = None
 
-    def setUp(self):
+    def setup_class(self):
+        """Setup the environment for the tests."""
+
+        global TEST_WORKSPACE
+        TEST_WORKSPACE = env.get_workspace('skip')
+
+        report_dir = os.path.join(TEST_WORKSPACE, 'reports')
+        os.makedirs(report_dir)
+
+        os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
+
+    def teardown_class(self):
+        """Delete the workspace associated with this test"""
+
+        # TODO: If environment variable is set keep the workspace
+        # and print out the path.
+        global TEST_WORKSPACE
+
+        print("Removing: " + TEST_WORKSPACE)
+        shutil.rmtree(TEST_WORKSPACE)
+
+    def setup_method(self, method):
 
         # TEST_WORKSPACE is automatically set by test package __init__.py .
         self.test_workspace = os.environ['TEST_WORKSPACE']
diff --git a/analyzer/tests/functional/suppress/__init__.py b/analyzer/tests/functional/suppress/__init__.py
index 0d8e496291..0b0114f7e4 100644
--- a/analyzer/tests/functional/suppress/__init__.py
+++ b/analyzer/tests/functional/suppress/__init__.py
@@ -7,120 +7,5 @@
 #
 # -------------------------------------------------------------------------
 
-"""Setup for the package tests."""
-
-
-import os
-import shutil
-import sys
-
-from libtest import codechecker
-from libtest import env
-from libtest import project
-
-TEST_WORKSPACE = None
-
-
-def setup_package():
-    """Setup the environment for the tests."""
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = env.get_workspace('suppress')
-
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-    test_project = 'suppress'
-
-    test_config = {}
-
-    project_info = project.get_info(test_project)
-
-    test_proj_path = os.path.join(TEST_WORKSPACE, "test_proj")
-    shutil.copytree(project.path(test_project), test_proj_path)
-
-    project_info['project_path'] = test_proj_path
-
-    test_config['test_project'] = project_info
-
-    # Generate a suppress file for the tests.
-    suppress_file = os.path.join(TEST_WORKSPACE, 'suppress_file')
-    if os.path.isfile(suppress_file):
-        os.remove(suppress_file)
-    _generate_suppress_file(suppress_file)
-
-    test_env = env.test_env(TEST_WORKSPACE)
-
-    codechecker_cfg = {
-        'suppress_file': None,
-        'skip_list_file': None,
-        'check_env': test_env,
-        'workspace': TEST_WORKSPACE,
-        'checkers': []
-    }
-
-    ret = project.clean(test_project, test_env)
-    if ret:
-        sys.exit(ret)
-
-    output_dir = codechecker_cfg['reportdir'] \
-        if 'reportdir' in codechecker_cfg \
-        else os.path.join(codechecker_cfg['workspace'], 'reports')
-
-    codechecker_cfg['reportdir'] = output_dir
-
-    ret = codechecker.log_and_analyze(codechecker_cfg,
-                                      project.path(test_project))
-
-    if ret:
-        sys.exit(1)
-    print("Analyzing the test project was successful.")
-
-    test_config['codechecker_cfg'] = codechecker_cfg
-
-    env.export_test_cfg(TEST_WORKSPACE, test_config)
-
-
-def teardown_package():
-    """Clean up after the test."""
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print("Removing: " + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
-
-
-def _generate_suppress_file(suppress_file):
-    """
-    Create a dummy suppress file just to check if the old and the new
-    suppress format can be processed.
-    """
-    print("Generating suppress file: " + suppress_file)
-
-    import calendar
-    import hashlib
-    import random
-    import time
-
-    hash_version = '1'
-    suppress_stuff = []
-    for _ in range(10):
-        curr_time = calendar.timegm(time.gmtime())
-        random_integer = random.randint(1, 9999999)
-        suppress_line = str(curr_time) + str(random_integer)
-        suppress_stuff.append(
-            hashlib.md5(suppress_line.encode("utf-8")).hexdigest() +
-            '#' + hash_version)
-
-    s_file = open(suppress_file, 'w', encoding='utf-8', errors='ignore')
-    for k in suppress_stuff:
-        s_file.write(k + '||' + 'idziei éléáálk ~!@#$#%^&*() \n')
-        s_file.write(
-            k + '||' + 'test_~!@#$%^&*.cpp' +
-            '||' + 'idziei éléáálk ~!@#$%^&*(\n')
-        s_file.write(
-            hashlib.md5(suppress_line.encode("utf-8")).hexdigest() + '||' +
-            'test_~!@#$%^&*.cpp' + '||' + 'idziei éléáálk ~!@#$%^&*(\n')
-
-    s_file.close()
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/analyzer/tests/functional/suppress/test_suppress.py b/analyzer/tests/functional/suppress/test_suppress.py
index 0cf04c889d..b227c8d8b2 100644
--- a/analyzer/tests/functional/suppress/test_suppress.py
+++ b/analyzer/tests/functional/suppress/test_suppress.py
@@ -12,17 +12,121 @@
 
 import os
 import inspect
+import shutil
+import sys
 import unittest
 
-from libtest import env, codechecker
+from libtest import env, codechecker, project
+
+
+def _generate_suppress_file(suppress_file):
+    """
+    Create a dummy suppress file just to check if the old and the new
+    suppress format can be processed.
+    """
+    print("Generating suppress file: " + suppress_file)
+
+    import calendar
+    import hashlib
+    import random
+    import time
+
+    hash_version = '1'
+    suppress_stuff = []
+    for _ in range(10):
+        curr_time = calendar.timegm(time.gmtime())
+        random_integer = random.randint(1, 9999999)
+        suppress_line = str(curr_time) + str(random_integer)
+        suppress_stuff.append(
+            hashlib.md5(suppress_line.encode("utf-8")).hexdigest() +
+            '#' + hash_version)
+
+    s_file = open(suppress_file, 'w', encoding='utf-8', errors='ignore')
+    for k in suppress_stuff:
+        s_file.write(k + '||' + 'idziei éléáálk ~!@#$#%^&*() \n')
+        s_file.write(
+            k + '||' + 'test_~!@#$%^&*.cpp' +
+            '||' + 'idziei éléáálk ~!@#$%^&*(\n')
+        s_file.write(
+            hashlib.md5(suppress_line.encode("utf-8")).hexdigest() + '||' +
+            'test_~!@#$%^&*.cpp' + '||' + 'idziei éléáálk ~!@#$%^&*(\n')
+
+    s_file.close()
 
 
 class TestSuppress(unittest.TestCase):
     """
     Test source-code level suppression data writing to suppress file.
     """
+    def setup_class(self):
+        """Setup the environment for the tests."""
+
+        global TEST_WORKSPACE
+        TEST_WORKSPACE = env.get_workspace('suppress')
+
+        os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
+
+        test_project = 'suppress'
+
+        test_config = {}
+
+        project_info = project.get_info(test_project)
+
+        test_proj_path = os.path.join(TEST_WORKSPACE, "test_proj")
+        shutil.copytree(project.path(test_project), test_proj_path)
+
+        project_info['project_path'] = test_proj_path
+
+        test_config['test_project'] = project_info
+
+        # Generate a suppress file for the tests.
+        suppress_file = os.path.join(TEST_WORKSPACE, 'suppress_file')
+        if os.path.isfile(suppress_file):
+            os.remove(suppress_file)
+        _generate_suppress_file(suppress_file)
+
+        test_env = env.test_env(TEST_WORKSPACE)
+
+        codechecker_cfg = {
+            'suppress_file': None,
+            'skip_list_file': None,
+            'check_env': test_env,
+            'workspace': TEST_WORKSPACE,
+            'checkers': []
+        }
+
+        ret = project.clean(test_project, test_env)
+        if ret:
+            sys.exit(ret)
+
+        output_dir = codechecker_cfg['reportdir'] \
+            if 'reportdir' in codechecker_cfg \
+            else os.path.join(codechecker_cfg['workspace'], 'reports')
+
+        codechecker_cfg['reportdir'] = output_dir
+
+        ret = codechecker.log_and_analyze(codechecker_cfg,
+                                          project.path(test_project))
+
+        if ret:
+            sys.exit(1)
+        print("Analyzing the test project was successful.")
+
+        test_config['codechecker_cfg'] = codechecker_cfg
+
+        env.export_test_cfg(TEST_WORKSPACE, test_config)
+
+    def teardown_class(self):
+        """Clean up after the test."""
+
+        # TODO: If environment variable is set keep the workspace
+        # and print out the path.
+        global TEST_WORKSPACE
+
+        print("Removing: " + TEST_WORKSPACE)
+        shutil.rmtree(TEST_WORKSPACE)
 
-    def setUp(self):
+    def setup_method(self, method):
         self._test_workspace = os.environ['TEST_WORKSPACE']
 
         self._testproject_data = env.setup_test_proj_cfg(self._test_workspace)
diff --git a/analyzer/tests/functional/z3/__init__.py b/analyzer/tests/functional/z3/__init__.py
index 550340a2ec..0b0114f7e4 100644
--- a/analyzer/tests/functional/z3/__init__.py
+++ b/analyzer/tests/functional/z3/__init__.py
@@ -7,84 +7,5 @@
 #
 # -------------------------------------------------------------------------
 
-""" Setup for the test package z3 capability. """
-
-
-import os
-import shutil
-import sys
-import uuid
-
-from libtest import codechecker
-from libtest import env
-from libtest import project
-
-
-# Test workspace should be initialized in this module.
-TEST_WORKSPACE = None
-
-
-def setup_package():
-    """Setup the environment for testing z3."""
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = env.get_workspace('z3')
-
-    # Set the TEST_WORKSPACE used by the tests.
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-    test_config = {}
-
-    test_project = 'suppress'
-
-    project_info = project.get_info(test_project)
-
-    # Copy the test project to the workspace. The tests should
-    # work only on this test project.
-    test_proj_path = os.path.join(TEST_WORKSPACE, "test_proj")
-    shutil.copytree(project.path(test_project), test_proj_path)
-
-    project_info['project_path'] = test_proj_path
-
-    test_config['test_project'] = project_info
-
-    # Suppress file should be set here if needed by the tests.
-    suppress_file = None
-
-    # Skip list file should be set here if needed by the tests.
-    skip_list_file = None
-
-    # Get an environment which should be used by the tests.
-    test_env = env.test_env(TEST_WORKSPACE)
-
-    # Create a basic CodeChecker config for the tests, this should
-    # be imported by the tests and they should only depend on these
-    # configuration options.
-    codechecker_cfg = {
-        'suppress_file': suppress_file,
-        'skip_list_file': skip_list_file,
-        'check_env': test_env,
-        'workspace': TEST_WORKSPACE,
-        'checkers': []
-    }
-
-    # Clean the test project, if needed by the tests.
-    ret = project.clean(test_project)
-    if ret:
-        sys.exit(ret)
-
-    test_config['codechecker_cfg'] = codechecker_cfg
-
-    # Export the test configuration to the workspace.
-    env.export_test_cfg(TEST_WORKSPACE, test_config)
-
-
-def teardown_package():
-    """Clean up after the test."""
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print("Removing: " + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE, ignore_errors=True)
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/analyzer/tests/functional/z3/test_z3.py b/analyzer/tests/functional/z3/test_z3.py
index 53c05f8dc3..75e0c0ffcb 100644
--- a/analyzer/tests/functional/z3/test_z3.py
+++ b/analyzer/tests/functional/z3/test_z3.py
@@ -12,10 +12,12 @@
 
 from distutils import util
 import os
+import shutil
 import unittest
 import shlex
+import sys
 
-from libtest import env
+from libtest import env, project
 from libtest.codechecker import call_command
 
 NO_Z3_MESSAGE = "Z3 is not supported"
@@ -25,7 +27,71 @@ class TestSkeleton(unittest.TestCase):
 
     _ccClient = None
 
-    def setUp(self):
+    def setup_class(self):
+        """Setup the environment for testing z3."""
+
+        global TEST_WORKSPACE
+        TEST_WORKSPACE = env.get_workspace('z3')
+
+        # Set the TEST_WORKSPACE used by the tests.
+        os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
+
+        test_config = {}
+
+        test_project = 'suppress'
+
+        project_info = project.get_info(test_project)
+
+        # Copy the test project to the workspace. The tests should
+        # work only on this test project.
+        test_proj_path = os.path.join(TEST_WORKSPACE, "test_proj")
+        shutil.copytree(project.path(test_project), test_proj_path)
+
+        project_info['project_path'] = test_proj_path
+
+        test_config['test_project'] = project_info
+
+        # Suppress file should be set here if needed by the tests.
+        suppress_file = None
+
+        # Skip list file should be set here if needed by the tests.
+        skip_list_file = None
+
+        # Get an environment which should be used by the tests.
+        test_env = env.test_env(TEST_WORKSPACE)
+
+        # Create a basic CodeChecker config for the tests, this should
+        # be imported by the tests and they should only depend on these
+        # configuration options.
+        codechecker_cfg = {
+            'suppress_file': suppress_file,
+            'skip_list_file': skip_list_file,
+            'check_env': test_env,
+            'workspace': TEST_WORKSPACE,
+            'checkers': []
+        }
+
+        # Clean the test project, if needed by the tests.
+        ret = project.clean(test_project)
+        if ret:
+            sys.exit(ret)
+
+        test_config['codechecker_cfg'] = codechecker_cfg
+
+        # Export the test configuration to the workspace.
+        env.export_test_cfg(TEST_WORKSPACE, test_config)
+
+    def teardown_class(self):
+        """Clean up after the test."""
+
+        # TODO: If environment variable is set keep the workspace
+        # and print out the path.
+        global TEST_WORKSPACE
+
+        print("Removing: " + TEST_WORKSPACE)
+        shutil.rmtree(TEST_WORKSPACE, ignore_errors=True)
+
+    def setup_method(self, method):
 
         # TEST_WORKSPACE is automatically set by test package __init__.py .
         test_workspace = os.environ['TEST_WORKSPACE']
diff --git a/analyzer/tests/unit/__init__.py b/analyzer/tests/unit/__init__.py
index 8e35e46afb..6f7442b714 100644
--- a/analyzer/tests/unit/__init__.py
+++ b/analyzer/tests/unit/__init__.py
@@ -22,3 +22,4 @@
 sys.path.append(os.path.join(
   REPO_ROOT, 'analyzer', 'tools', 'statistics_collector'))
 sys.path.append(os.path.join(REPO_ROOT, 'tools', 'report-converter'))
+sys.path.append(os.path.join(PKG_ROOT, 'lib', 'python3'))
diff --git a/analyzer/tests/unit/test_buildcmd_escaping.py b/analyzer/tests/unit/test_buildcmd_escaping.py
index c414e9d29b..9819f8e816 100644
--- a/analyzer/tests/unit/test_buildcmd_escaping.py
+++ b/analyzer/tests/unit/test_buildcmd_escaping.py
@@ -19,7 +19,7 @@
 from codechecker_analyzer.buildlog import log_parser
 
 
-class BuildCmdTestNose(unittest.TestCase):
+class BuildCmdTest(unittest.TestCase):
     """
     Test the build command escaping and execution.
     """
diff --git a/analyzer/tests/unit/test_result_handler.py b/analyzer/tests/unit/test_result_handler.py
index ffbd6898c8..c36385cff7 100644
--- a/analyzer/tests/unit/test_result_handler.py
+++ b/analyzer/tests/unit/test_result_handler.py
@@ -19,7 +19,7 @@ class BuildAction:
     original_command = None
 
 
-class ResultHandlerTestNose(unittest.TestCase):
+class ResultHandlerTest(unittest.TestCase):
     """
     Test some functions of ResultHandler base class.
     """
diff --git a/analyzer/tools/build-logger/.noserc b/analyzer/tools/build-logger/.noserc
deleted file mode 100644
index 512f4e1a08..0000000000
--- a/analyzer/tools/build-logger/.noserc
+++ /dev/null
@@ -1,13 +0,0 @@
-[nosetests]
-
-# increase verbosity level
-verbosity=3
-
-# more detailed error messages on failed asserts
-detailed-errors=1
-
-# stop running tests on first error
-stop=1
-
-# do not capture stdout
-#nocapture=1
diff --git a/analyzer/tools/build-logger/pytest.ini b/analyzer/tools/build-logger/pytest.ini
new file mode 100644
index 0000000000..7ee6b8962d
--- /dev/null
+++ b/analyzer/tools/build-logger/pytest.ini
@@ -0,0 +1,13 @@
+[pytest]
+
+addopts =
+# increase verbosity level
+  --verbose
+
+# stop running tests on first error
+# FIXME: Pretty please comment this horrible setting out, I hate it with a
+# passion
+#  --maxfail=1
+
+# do not capture stdout
+  --capture=sys
diff --git a/analyzer/tools/build-logger/requirements_py/dev/requirements.txt b/analyzer/tools/build-logger/requirements_py/dev/requirements.txt
index 14d0a89bcd..dea2d59c92 100644
--- a/analyzer/tools/build-logger/requirements_py/dev/requirements.txt
+++ b/analyzer/tools/build-logger/requirements_py/dev/requirements.txt
@@ -1,3 +1,3 @@
-nose==1.3.7
+pytest==7.3.1
 pycodestyle==2.4.0
-pylint==2.8.2
\ No newline at end of file
+pylint==2.8.2
diff --git a/analyzer/tools/build-logger/tests/Makefile b/analyzer/tools/build-logger/tests/Makefile
index e9e8ac5580..332146eb7b 100644
--- a/analyzer/tools/build-logger/tests/Makefile
+++ b/analyzer/tools/build-logger/tests/Makefile
@@ -2,8 +2,8 @@
 
 REPO_ROOT ?= REPO_ROOT=$(ROOT)
 
-# Nose test runner configuration options.
-NOSECFG = --config .noserc
+# pytest test runner configuration options.
+PYTESTCFG = -c pytest.ini
 
 test: pycodestyle pylint test_unit
 
@@ -27,7 +27,7 @@ pylint_in_env: venv
 	$(ACTIVATE_DEV_VENV) && $(PYLINT_TEST_CMD)
 
 UNIT_TEST_CMD = $(REPO_ROOT) \
-  nosetests $(NOSECFG) tests/unit
+  pytest $(PYTESTCFG) tests/unit
 
 test_unit:
 	$(UNIT_TEST_CMD)
diff --git a/analyzer/tools/merge_clang_extdef_mappings/.noserc b/analyzer/tools/merge_clang_extdef_mappings/.noserc
deleted file mode 100644
index 512f4e1a08..0000000000
--- a/analyzer/tools/merge_clang_extdef_mappings/.noserc
+++ /dev/null
@@ -1,13 +0,0 @@
-[nosetests]
-
-# increase verbosity level
-verbosity=3
-
-# more detailed error messages on failed asserts
-detailed-errors=1
-
-# stop running tests on first error
-stop=1
-
-# do not capture stdout
-#nocapture=1
diff --git a/analyzer/tools/merge_clang_extdef_mappings/pytest.ini b/analyzer/tools/merge_clang_extdef_mappings/pytest.ini
new file mode 100644
index 0000000000..7ee6b8962d
--- /dev/null
+++ b/analyzer/tools/merge_clang_extdef_mappings/pytest.ini
@@ -0,0 +1,13 @@
+[pytest]
+
+addopts =
+# increase verbosity level
+  --verbose
+
+# stop running tests on first error
+# FIXME: Pretty please comment this horrible setting out, I hate it with a
+# passion
+#  --maxfail=1
+
+# do not capture stdout
+  --capture=sys
diff --git a/analyzer/tools/merge_clang_extdef_mappings/requirements_py/dev/requirements.txt b/analyzer/tools/merge_clang_extdef_mappings/requirements_py/dev/requirements.txt
index 7ac0c0aa2e..dea2d59c92 100644
--- a/analyzer/tools/merge_clang_extdef_mappings/requirements_py/dev/requirements.txt
+++ b/analyzer/tools/merge_clang_extdef_mappings/requirements_py/dev/requirements.txt
@@ -1,3 +1,3 @@
-nose==1.3.7
+pytest==7.3.1
 pycodestyle==2.4.0
 pylint==2.8.2
diff --git a/analyzer/tools/merge_clang_extdef_mappings/tests/Makefile b/analyzer/tools/merge_clang_extdef_mappings/tests/Makefile
index bf4abc5b56..66930290ab 100644
--- a/analyzer/tools/merge_clang_extdef_mappings/tests/Makefile
+++ b/analyzer/tools/merge_clang_extdef_mappings/tests/Makefile
@@ -2,8 +2,8 @@
 
 REPO_ROOT ?= REPO_ROOT=$(ROOT)
 
-# Nose test runner configuration options.
-NOSECFG = --config .noserc
+# pytest test runner configuration options.
+PYTESTCFG = -c pytest.ini
 
 test: pycodestyle pylint test_unit
 
@@ -27,7 +27,7 @@ pylint_in_env: venv
 	$(ACTIVATE_DEV_VENV) && $(PYLINT_TEST_CMD)
 
 UNIT_TEST_CMD = $(REPO_ROOT) \
-  nosetests $(NOSECFG) tests/unit
+  pytest $(PYTESTCFG) tests/unit
 
 test_unit:
 	$(UNIT_TEST_CMD)
diff --git a/analyzer/tools/merge_clang_extdef_mappings/tests/unit/__init__.py b/analyzer/tools/merge_clang_extdef_mappings/tests/unit/__init__.py
index 4259749345..c765d8fae4 100644
--- a/analyzer/tools/merge_clang_extdef_mappings/tests/unit/__init__.py
+++ b/analyzer/tools/merge_clang_extdef_mappings/tests/unit/__init__.py
@@ -5,3 +5,17 @@
 #  SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #
 # -------------------------------------------------------------------------
+
+import os
+import sys
+
+REPO_ROOT = os.path.abspath(os.environ['REPO_ROOT'])
+PKG_ROOT = os.path.join(REPO_ROOT, 'build', 'CodeChecker')
+
+os.environ["CC_DATA_FILES_DIR"] = PKG_ROOT
+
+sys.path.append(REPO_ROOT)
+sys.path.append(os.path.join(
+  REPO_ROOT, 'analyzer', 'tools', 'statistics_collector'))
+sys.path.append(os.path.join(REPO_ROOT, 'tools', 'report-converter'))
+sys.path.append(os.path.join(PKG_ROOT, 'lib', 'python3'))
diff --git a/analyzer/tools/merge_clang_extdef_mappings/tests/unit/merge_clang_extdef_mappings/__init__.py b/analyzer/tools/merge_clang_extdef_mappings/tests/unit/merge_clang_extdef_mappings/__init__.py
index b3a2aa1f9d..0b0114f7e4 100644
--- a/analyzer/tools/merge_clang_extdef_mappings/tests/unit/merge_clang_extdef_mappings/__init__.py
+++ b/analyzer/tools/merge_clang_extdef_mappings/tests/unit/merge_clang_extdef_mappings/__init__.py
@@ -6,49 +6,6 @@
 #  SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #
 # -------------------------------------------------------------------------
-""" Setup for the test package analyze. """
 
-import os
-import shutil
-import tempfile
-
-
-def get_workspace(test_id='test'):
-    """ Return a temporary workspace for the tests. """
-    workspace_root = os.environ.get("MERGE_CTU_FUNC_MAPS_TEST_WORKSPACE_ROOT")
-    if not workspace_root:
-        # if no external workspace is set create under the build dir
-        workspace_root = os.path.join(os.environ['REPO_ROOT'], 'build',
-                                      'workspace')
-
-    if not os.path.exists(workspace_root):
-        os.makedirs(workspace_root)
-
-    if test_id:
-        return tempfile.mkdtemp(prefix=test_id + "-", dir=workspace_root)
-    else:
-        return workspace_root
-
-
-# Test workspace should be initialized in this module.
-TEST_WORKSPACE = None
-
-
-def setup_package():
-    """ Setup the environment for the tests. """
-
-    global TEST_WORKSPACE
-    TEST_WORKSPACE = get_workspace('merge_clang_extdef_mappings')
-
-    os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
-
-
-def teardown_package():
-    """ Delete the workspace associated with this test. """
-
-    # TODO: If environment variable is set keep the workspace
-    # and print out the path.
-    global TEST_WORKSPACE
-
-    print("Removing: " + TEST_WORKSPACE)
-    shutil.rmtree(TEST_WORKSPACE)
+# This file is empty, and is only present so that this directory will form a
+# package.
diff --git a/analyzer/tools/merge_clang_extdef_mappings/tests/unit/merge_clang_extdef_mappings/merge_clang_extdef_mappings.py b/analyzer/tools/merge_clang_extdef_mappings/tests/unit/merge_clang_extdef_mappings/test_merge_clang_extdef_mappings.py
similarity index 66%
rename from analyzer/tools/merge_clang_extdef_mappings/tests/unit/merge_clang_extdef_mappings/merge_clang_extdef_mappings.py
rename to analyzer/tools/merge_clang_extdef_mappings/tests/unit/merge_clang_extdef_mappings/test_merge_clang_extdef_mappings.py
index dd0fc9ddd2..a788cc76ba 100644
--- a/analyzer/tools/merge_clang_extdef_mappings/tests/unit/merge_clang_extdef_mappings/merge_clang_extdef_mappings.py
+++ b/analyzer/tools/merge_clang_extdef_mappings/tests/unit/merge_clang_extdef_mappings/test_merge_clang_extdef_mappings.py
@@ -8,13 +8,50 @@
 
 import os
 import unittest
+import shutil
+import tempfile
 
 from codechecker_merge_clang_extdef_mappings import merge_clang_extdef_mappings
 
 
-class MergeClangExtdefMappingsTest(unittest.TestCase):
-    @classmethod
-    def setUpClass(self):
+def get_workspace(test_id='test'):
+    """ Return a temporary workspace for the tests. """
+    workspace_root = os.environ.get("MERGE_CTU_FUNC_MAPS_TEST_WORKSPACE_ROOT")
+    if not workspace_root:
+        # if no external workspace is set create under the build dir
+        workspace_root = os.path.join(os.environ['REPO_ROOT'], 'build',
+                                      'workspace')
+
+    if not os.path.exists(workspace_root):
+        os.makedirs(workspace_root)
+
+    if test_id:
+        return tempfile.mkdtemp(prefix=test_id + "-", dir=workspace_root)
+    else:
+        return workspace_root
+
+
+class TestMergeClangExtdefMappingsTest(unittest.TestCase):
+
+    def setup_class(self):
+        """ Setup the environment for the tests. """
+
+        global TEST_WORKSPACE
+        TEST_WORKSPACE = get_workspace('merge_clang_extdef_mappings')
+
+        os.environ['TEST_WORKSPACE'] = TEST_WORKSPACE
+
+    def teardown_class(self):
+        """ Delete the workspace associated with this test. """
+
+        # TODO: If environment variable is set keep the workspace
+        # and print out the path.
+        global TEST_WORKSPACE
+
+        print("Removing: " + TEST_WORKSPACE)
+        shutil.rmtree(TEST_WORKSPACE)
+
+    def setup_method(self, method):
         """ Initialize test files. """
         self.test_workspace = os.environ['TEST_WORKSPACE']
 
diff --git a/analyzer/tools/statistics_collector/.noserc b/analyzer/tools/statistics_collector/.noserc
deleted file mode 100644
index 512f4e1a08..0000000000
--- a/analyzer/tools/statistics_collector/.noserc
+++ /dev/null
@@ -1,13 +0,0 @@
-[nosetests]
-
-# increase verbosity level
-verbosity=3
-
-# more detailed error messages on failed asserts
-detailed-errors=1
-
-# stop running tests on first error
-stop=1
-
-# do not capture stdout
-#nocapture=1
diff --git a/analyzer/tools/statistics_collector/pytest.ini b/analyzer/tools/statistics_collector/pytest.ini
new file mode 100644
index 0000000000..7ee6b8962d
--- /dev/null
+++ b/analyzer/tools/statistics_collector/pytest.ini
@@ -0,0 +1,13 @@
+[pytest]
+
+addopts =
+# increase verbosity level
+  --verbose
+
+# stop running tests on first error
+# FIXME: Pretty please comment this horrible setting out, I hate it with a
+# passion
+#  --maxfail=1
+
+# do not capture stdout
+  --capture=sys
diff --git a/analyzer/tools/statistics_collector/requirements_py/dev/requirements.txt b/analyzer/tools/statistics_collector/requirements_py/dev/requirements.txt
index 7ac0c0aa2e..dea2d59c92 100644
--- a/analyzer/tools/statistics_collector/requirements_py/dev/requirements.txt
+++ b/analyzer/tools/statistics_collector/requirements_py/dev/requirements.txt
@@ -1,3 +1,3 @@
-nose==1.3.7
+pytest==7.3.1
 pycodestyle==2.4.0
 pylint==2.8.2
diff --git a/analyzer/tools/statistics_collector/tests/Makefile b/analyzer/tools/statistics_collector/tests/Makefile
index af15b8f8ab..b1d49dbdbb 100644
--- a/analyzer/tools/statistics_collector/tests/Makefile
+++ b/analyzer/tools/statistics_collector/tests/Makefile
@@ -2,8 +2,8 @@
 
 REPO_ROOT ?= REPO_ROOT=$(ROOT)
 
-# Nose test runner configuration options.
-NOSECFG = --config .noserc
+# pytest test runner configuration options.
+PYTESTCFG = -c pytest.ini
 
 test: pycodestyle pylint test_unit
 
@@ -27,7 +27,7 @@ pylint_in_env: venv
 	$(ACTIVATE_DEV_VENV) && $(PYLINT_TEST_CMD)
 
 UNIT_TEST_CMD = $(REPO_ROOT) \
-  nosetests $(NOSECFG) tests/unit
+  pytest $(PYTESTCFG) tests/unit
 
 test_unit:
 	$(UNIT_TEST_CMD)
diff --git a/analyzer/tools/statistics_collector/tests/unit/__init__.py b/analyzer/tools/statistics_collector/tests/unit/__init__.py
index 4259749345..c765d8fae4 100644
--- a/analyzer/tools/statistics_collector/tests/unit/__init__.py
+++ b/analyzer/tools/statistics_collector/tests/unit/__init__.py
@@ -5,3 +5,17 @@
 #  SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 #
 # -------------------------------------------------------------------------
+
+import os
+import sys
+
+REPO_ROOT = os.path.abspath(os.environ['REPO_ROOT'])
+PKG_ROOT = os.path.join(REPO_ROOT, 'build', 'CodeChecker')
+
+os.environ["CC_DATA_FILES_DIR"] = PKG_ROOT
+
+sys.path.append(REPO_ROOT)
+sys.path.append(os.path.join(
+  REPO_ROOT, 'analyzer', 'tools', 'statistics_collector'))
+sys.path.append(os.path.join(REPO_ROOT, 'tools', 'report-converter'))
+sys.path.append(os.path.join(PKG_ROOT, 'lib', 'python3'))
diff --git a/tools/report-converter/codechecker_report_converter/report/parser/plist.py b/tools/report-converter/codechecker_report_converter/report/parser/plist.py
index 7ddcce2524..4e279dae82 100644
--- a/tools/report-converter/codechecker_report_converter/report/parser/plist.py
+++ b/tools/report-converter/codechecker_report_converter/report/parser/plist.py
@@ -76,12 +76,9 @@ def __init__(self, dict_type=dict):
         # To be backward compatible with old interpreters we need to call this
         # function based on conditions:
         params = _PlistParser.__init__.__code__.co_varnames
-        # Before 3.9 interpreter. When a newer interpreter is used, pylint will
-        # complain that too many arguments are used to invoke __init__, but
-        # with newer interpreters, this is deadcode.
         if len(params) == 3 and "use_builtin_types" in params:
-            _PlistParser.__init__(self, True, dict_type)# pylint: disable=E1121
-        # After 3.9 interpreter.
+            # Before 3.9 interpreter.
+            _PlistParser.__init__(self, True, dict_type)
         else:
             _PlistParser.__init__(self, dict_type)  # pylint: disable=E1120