diff --git a/src/julia/options.py b/src/julia/options.py
index 52d93647..00ba9801 100644
--- a/src/julia/options.py
+++ b/src/julia/options.py
@@ -41,6 +41,35 @@ def _domain(self):  # used in test
         return str
 
 
+class IntEtc(OptionDescriptor):
+    def __init__(self, name, *, etc={}):
+        self.name = name
+        self.default = etc
+
+    def __set__(self, instance, value):
+        if instance is None:
+            raise AttributeError(self.name)
+        elif value in {None, *self.default} or isinstance(value, int):
+            setattr(instance, self.dataname, value)
+        else:
+            if self.default:
+                part = " or " + " ".join(map(str, self.default))
+            else:
+                part = ""
+            raise ValueError(
+                f"Option {self.name} only accepts integers{part}. Got: {value}"
+            )
+
+    def _domain(self):
+        return {int, *self.default}
+
+    def cli_argument_spec(self):
+        return dict(
+            super(IntEtc, self).cli_argument_spec(),
+            choices=list(self.default) + ["1", "2", "3", "..."],
+        )
+
+
 class Choices(OptionDescriptor):
     def __init__(self, name, choicemap, default=None):
         self.name = name
@@ -110,6 +139,12 @@ def yes_no_etc(*etc):
 
 warn_overwrite: {True, False, 'yes', 'no'}
     Enable or disable method overwrite warnings.
+
+min_optlevel: {0, 1, 2, 3}
+    Lower bound on the optimization level.
+
+threads: {int, 'auto'}
+    How many threads to use.
 """
 
 
@@ -134,9 +169,11 @@ class JuliaOptions(object):
     compile = Choices("compile", yes_no_etc("all", "min"))
     depwarn = Choices("depwarn", yes_no_etc("error"))
     warn_overwrite = Choices("warn_overwrite", yes_no_etc())
+    min_optlevel = Choices("min_optlevel", dict(zip(range(4), map(str, range(4)))))
     optimize = Choices("optimize", dict(zip(range(4), map(str, range(4)))))
     inline = Choices("inline", yes_no_etc())
     check_bounds = Choices("check_bounds", yes_no_etc())
+    threads = IntEtc("threads", etc={"auto"})
 
     def __init__(self, **kwargs):
         unsupported = []
@@ -168,8 +205,12 @@ def specified(self):
     def as_args(self):
         args = []
         for (desc, value) in self.specified():
-            args.append(desc.cli_argument_name())
-            args.append(value)
+            if value is None:
+                ...
+            elif len(desc.cli_argument_name()) == 1:
+                args.append(desc.cli_argument_name() + str(value))
+            else:
+                args.append(desc.cli_argument_name() + "=" + str(value))
         return args
 
     @classmethod
diff --git a/src/julia/tests/test_compatible_exe.py b/src/julia/tests/test_compatible_exe.py
index afa78cf9..13a61c1f 100644
--- a/src/julia/tests/test_compatible_exe.py
+++ b/src/julia/tests/test_compatible_exe.py
@@ -23,7 +23,7 @@ def discover_other_pythons():
         [sys.executable, "--version"], universal_newlines=True, stderr=subprocess.STDOUT
     )
 
-    candidate_names = ["python", "python2", "python2.7", "python3"] + [
+    candidate_names = ["python", "python3"] + [
         "python3.{}".format(i) for i in range(20)
     ]
     found = {}
diff --git a/src/julia/tests/test_juliaoptions.py b/src/julia/tests/test_juliaoptions.py
index b793e730..cb82953a 100644
--- a/src/julia/tests/test_juliaoptions.py
+++ b/src/julia/tests/test_juliaoptions.py
@@ -7,12 +7,17 @@
 @pytest.mark.parametrize("kwargs, args", [
     ({}, []),
     (dict(compiled_modules=None), []),
-    (dict(compiled_modules=False), ["--compiled-modules", "no"]),
-    (dict(compiled_modules="no"), ["--compiled-modules", "no"]),
-    (dict(depwarn="error"), ["--depwarn", "error"]),
-    (dict(sysimage="PATH"), ["--sysimage", "PATH"]),
-    (dict(bindir="PATH"), ["--home", "PATH"]),
-    (dict(optimize=3), ["--optimize", "3"]),
+    (dict(compiled_modules=False), ["--compiled-modules=no"]),
+    (dict(compiled_modules="no"), ["--compiled-modules=no"]),
+    (dict(depwarn="error"), ["--depwarn=error"]),
+    (dict(sysimage="PATH"), ["--sysimage=PATH"]),
+    (dict(bindir="PATH"), ["--home=PATH"]),
+    (dict(optimize=3), ["--optimize=3"]),
+    (dict(threads=4), ["--threads=4"]),
+    (dict(min_optlevel=2), ["--min-optlevel=2"]),
+    (dict(threads="auto", optimize=3), ["--optimize=3", '--threads=auto']),
+    (dict(optimize=3, threads="auto"), ["--optimize=3", '--threads=auto']),  # passed order doesn't matter
+    (dict(compiled_modules=None, depwarn="yes"), ["--depwarn=yes"]),
 ])
 # fmt: on
 def test_as_args(kwargs, args):