chore: try to address more coverage failures

Author: vchudnov-g

tests/unit/test_bidi.py

@@ -833,7 +833,7 @@ def test_rpc_callback_fires_when_consumer_start_fails(self):
 
         # Wait for the consumer's thread to exit.
         while consumer.is_active:
-            pass
+            pass  # pragma: NO COVER
 
         assert callback.call_args.args[0] == grpc.StatusCode.INVALID_ARGUMENT
 

tests/unit/test_python_version_support.py

@@ -34,7 +34,7 @@ def _create_failure_message(
     expected, result, py_version, date, gapic_dep, py_eol, eol_warn, gapic_end
 ):
     """Create a detailed failure message for a test."""
-    return textwrap.dedent(
+    return textwrap.dedent(  # pragma: NO COVER
         f"""
         --- Test Failed ---
         Expected status: {expected.name}
@@ -129,7 +129,7 @@ def test_all_tracked_versions_and_date_scenarios(
                 (result != expected_status)
                 or (result != PythonVersionStatus.PYTHON_VERSION_SUPPORTED)
                 and mock_log.call_count != 1
-            ):
+            ):  # pragma: NO COVER
                 py_version_str = f"{version_tuple[0]}.{version_tuple[1]}"
                 version_info = PYTHON_VERSION_INFO[version_tuple]