diff --git a/tests/__init__.py b/tests/__init__.py
index 3bd5a22a28..33307c0081 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -40,6 +40,16 @@
 _LOADER = botocore.loaders.Loader()
 
 
+def _all_services():
+    session = botocore.session.Session()
+    service_names = session.get_available_services()
+    return [session.get_service_model(name) for name in service_names]
+
+
+# Only compute our service models once
+ALL_SERVICES = _all_services()
+
+
 def skip_unless_has_memory_collection(cls):
     """Class decorator to skip tests that require memory collection.
 
@@ -575,3 +585,16 @@ def __enter__(self, *args, **kwargs):
 
     def __exit__(self, *args, **kwargs):
         self.datetime_patcher.stop()
+
+
+def patch_load_service_model(
+    session, monkeypatch, service_model_json, ruleset_json
+):
+    def mock_load_service_model(service_name, type_name, api_version=None):
+        if type_name == 'service-2':
+            return service_model_json
+        if type_name == 'endpoint-rule-set-1':
+            return ruleset_json
+
+    loader = session.get_component('data_loader')
+    monkeypatch.setattr(loader, 'load_service_model', mock_load_service_model)
diff --git a/tests/functional/test_context_params.py b/tests/functional/test_context_params.py
index d72b65b265..03eb9ae965 100644
--- a/tests/functional/test_context_params.py
+++ b/tests/functional/test_context_params.py
@@ -14,7 +14,7 @@
 import pytest
 
 from botocore.config import Config
-from tests import ClientHTTPStubber, mock
+from tests import ClientHTTPStubber, mock, patch_load_service_model
 
 # fake rulesets compatible with all fake service models below
 FAKE_RULESET_TEMPLATE = {
@@ -226,19 +226,6 @@
 }
 
 
-def patch_load_service_model(
-    session, monkeypatch, service_model_json, ruleset_json
-):
-    def mock_load_service_model(service_name, type_name, api_version=None):
-        if type_name == 'service-2':
-            return service_model_json
-        if type_name == 'endpoint-rule-set-1':
-            return ruleset_json
-
-    loader = session.get_component('data_loader')
-    monkeypatch.setattr(loader, 'load_service_model', mock_load_service_model)
-
-
 @pytest.mark.parametrize(
     'service_name,service_model,ruleset,call_should_include_ctx_param',
     [
diff --git a/tests/functional/test_response_shadowing.py b/tests/functional/test_response_shadowing.py
index 708e989231..a5cbaac047 100644
--- a/tests/functional/test_response_shadowing.py
+++ b/tests/functional/test_response_shadowing.py
@@ -12,17 +12,7 @@
 # language governing permissions and limitations under the License.
 import pytest
 
-from botocore.session import Session
-
-
-def _all_services():
-    session = Session()
-    service_names = session.get_available_services()
-    return [session.get_service_model(name) for name in service_names]
-
-
-# Only compute our service models once
-ALL_SERVICES = _all_services()
+from tests import ALL_SERVICES
 
 
 def _all_service_error_shapes():