diff --git a/google/cloud/iam_credentials_v1/services/iam_credentials/async_client.py b/google/cloud/iam_credentials_v1/services/iam_credentials/async_client.py
index 72750746..41315634 100644
--- a/google/cloud/iam_credentials_v1/services/iam_credentials/async_client.py
+++ b/google/cloud/iam_credentials_v1/services/iam_credentials/async_client.py
@@ -841,7 +841,7 @@ async def sample_sign_jwt():
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "IAMCredentialsAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):
diff --git a/google/cloud/iam_v2/services/policies/async_client.py b/google/cloud/iam_v2/services/policies/async_client.py
index 15fedd21..cca458c9 100644
--- a/google/cloud/iam_v2/services/policies/async_client.py
+++ b/google/cloud/iam_v2/services/policies/async_client.py
@@ -930,7 +930,7 @@ async def get_operation(
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "PoliciesAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):
diff --git a/google/cloud/iam_v2beta/services/policies/async_client.py b/google/cloud/iam_v2beta/services/policies/async_client.py
index d19fdc8c..8b4b9ad3 100644
--- a/google/cloud/iam_v2beta/services/policies/async_client.py
+++ b/google/cloud/iam_v2beta/services/policies/async_client.py
@@ -930,7 +930,7 @@ async def get_operation(
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "PoliciesAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):
diff --git a/samples/generated_samples/snippet_metadata_google.iam.credentials.v1.json b/samples/generated_samples/snippet_metadata_google.iam.credentials.v1.json
index eaba9204..1e024f5c 100644
--- a/samples/generated_samples/snippet_metadata_google.iam.credentials.v1.json
+++ b/samples/generated_samples/snippet_metadata_google.iam.credentials.v1.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-iam",
-    "version": "2.12.0"
+    "version": "0.1.0"
   },
   "snippets": [
     {
diff --git a/samples/generated_samples/snippet_metadata_google.iam.v2.json b/samples/generated_samples/snippet_metadata_google.iam.v2.json
index 682a42a9..41cce8e2 100644
--- a/samples/generated_samples/snippet_metadata_google.iam.v2.json
+++ b/samples/generated_samples/snippet_metadata_google.iam.v2.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-iam",
-    "version": "2.12.0"
+    "version": "0.1.0"
   },
   "snippets": [
     {
diff --git a/samples/generated_samples/snippet_metadata_google.iam.v2beta.json b/samples/generated_samples/snippet_metadata_google.iam.v2beta.json
index cc746be6..5c06ffb6 100644
--- a/samples/generated_samples/snippet_metadata_google.iam.v2beta.json
+++ b/samples/generated_samples/snippet_metadata_google.iam.v2beta.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-iam",
-    "version": "2.12.0"
+    "version": "0.1.0"
   },
   "snippets": [
     {
diff --git a/tests/unit/gapic/iam_v2/test_policies.py b/tests/unit/gapic/iam_v2/test_policies.py
index 6d6c4711..677d4b92 100644
--- a/tests/unit/gapic/iam_v2/test_policies.py
+++ b/tests/unit/gapic/iam_v2/test_policies.py
@@ -1093,9 +1093,11 @@ async def test_list_policies_async_pages():
             RuntimeError,
         )
         pages = []
-        async for page_ in (
+        # Workaround issue in python 3.9 related to code coverage by adding `# pragma: no branch`
+        # See https://github.com/googleapis/gapic-generator-python/pull/1174#issuecomment-1025132372
+        async for page_ in (  # pragma: no branch
             await client.list_policies(request={})
-        ).pages:  # pragma: no branch
+        ).pages:
             pages.append(page_)
         for page_, token in zip(pages, ["abc", "def", "ghi", ""]):
             assert page_.raw_page.next_page_token == token
diff --git a/tests/unit/gapic/iam_v2beta/test_policies.py b/tests/unit/gapic/iam_v2beta/test_policies.py
index 520646d8..d878e688 100644
--- a/tests/unit/gapic/iam_v2beta/test_policies.py
+++ b/tests/unit/gapic/iam_v2beta/test_policies.py
@@ -1071,9 +1071,11 @@ async def test_list_policies_async_pages():
             RuntimeError,
         )
         pages = []
-        async for page_ in (
+        # Workaround issue in python 3.9 related to code coverage by adding `# pragma: no branch`
+        # See https://github.com/googleapis/gapic-generator-python/pull/1174#issuecomment-1025132372
+        async for page_ in (  # pragma: no branch
             await client.list_policies(request={})
-        ).pages:  # pragma: no branch
+        ).pages:
             pages.append(page_)
         for page_, token in zip(pages, ["abc", "def", "ghi", ""]):
             assert page_.raw_page.next_page_token == token