diff --git a/packages/gapic-generator/gapic/ads-templates/tests/unit/gapic/%name_%version/%sub/test_%service.py.j2 b/packages/gapic-generator/gapic/ads-templates/tests/unit/gapic/%name_%version/%sub/test_%service.py.j2
index 6ef2d20d14f8..4511497eccde 100644
--- a/packages/gapic-generator/gapic/ads-templates/tests/unit/gapic/%name_%version/%sub/test_%service.py.j2
+++ b/packages/gapic-generator/gapic/ads-templates/tests/unit/gapic/%name_%version/%sub/test_%service.py.j2
@@ -692,7 +692,7 @@ def test_{{ method_name }}_empty_call():
 {% if method_settings is not none %}
 {% for auto_populated_field in method_settings.auto_populated_fields %}
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"{{ uuid4_re }}", args[0].{{ auto_populated_field }})
+        assert re.fullmatch(r"{{ uuid4_re }}", args[0].{{ auto_populated_field }})
         # clear UUID field so that the check below succeeds
         args[0].{{ auto_populated_field }} = None
 {% endfor %}
@@ -730,7 +730,7 @@ def test_{{ method_name }}_non_empty_request_with_auto_populated_field():
 {% if method_settings is not none %}
 {% for auto_populated_field in method_settings.auto_populated_fields %}
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"{{ uuid4_re }}", args[0].{{ auto_populated_field }})
+        assert re.fullmatch(r"{{ uuid4_re }}", args[0].{{ auto_populated_field }})
         # clear UUID field so that the check below succeeds
         args[0].{{ auto_populated_field }} = None
 {% endfor %}
diff --git a/packages/gapic-generator/gapic/templates/tests/unit/gapic/%name_%version/%sub/test_macros.j2 b/packages/gapic-generator/gapic/templates/tests/unit/gapic/%name_%version/%sub/test_macros.j2
index 475f9f3d3f13..9e3f4be26b13 100644
--- a/packages/gapic-generator/gapic/templates/tests/unit/gapic/%name_%version/%sub/test_macros.j2
+++ b/packages/gapic-generator/gapic/templates/tests/unit/gapic/%name_%version/%sub/test_macros.j2
@@ -151,7 +151,7 @@ def test_{{ method_name }}_non_empty_request_with_auto_populated_field():
 {% if method_settings is not none %}
 {% for auto_populated_field in method_settings.auto_populated_fields %}
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"{{ get_uuid4_re() }}", args[0].{{ auto_populated_field }})
+        assert re.fullmatch(r"{{ get_uuid4_re() }}", args[0].{{ auto_populated_field }})
         # clear UUID field so that the check below succeeds
         args[0].{{ auto_populated_field }} = None
 {% endfor %}
@@ -1224,7 +1224,7 @@ def test_{{ method_name }}_rest_required_fields(request_type={{ method.input.ide
             # Ensure that the uuid4 field is set according to AIP 4235
             for i, (key, value) in enumerate(req.call_args.kwargs['params']):
                 if key == "{{ auto_populated_field|camel_case }}":
-                    assert re.match(r"{{ get_uuid4_re() }}", value)
+                    assert re.fullmatch(r"{{ get_uuid4_re() }}", value)
                     break
             
             # Include {{ auto_populated_field|camel_case }} within expected_params with value mock.ANY
@@ -1576,7 +1576,7 @@ def test_{{ method_name }}_rest_no_http_options():
         {% if method_settings is not none %}
         {% for auto_populated_field in method_settings.auto_populated_fields %}
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"{{ get_uuid4_re() }}", args[0].{{ auto_populated_field }})
+        assert re.fullmatch(r"{{ get_uuid4_re() }}", args[0].{{ auto_populated_field }})
         # clear UUID field so that the check below succeeds
         args[0].{{ auto_populated_field }} = None
         {% endfor %}{# for auto_populated_field in method_settings.auto_populated_fields #}
diff --git a/packages/gapic-generator/tests/integration/goldens/storagebatchoperations/tests/unit/gapic/storagebatchoperations_v1/test_storage_batch_operations.py b/packages/gapic-generator/tests/integration/goldens/storagebatchoperations/tests/unit/gapic/storagebatchoperations_v1/test_storage_batch_operations.py
index c637c8f077e0..9f6d000ab291 100755
--- a/packages/gapic-generator/tests/integration/goldens/storagebatchoperations/tests/unit/gapic/storagebatchoperations_v1/test_storage_batch_operations.py
+++ b/packages/gapic-generator/tests/integration/goldens/storagebatchoperations/tests/unit/gapic/storagebatchoperations_v1/test_storage_batch_operations.py
@@ -1863,7 +1863,7 @@ def test_create_job_non_empty_request_with_auto_populated_field():
         call.assert_called()
         _, args, _ = call.mock_calls[0]
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
+        assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
         # clear UUID field so that the check below succeeds
         args[0].request_id = None
         assert args[0] == storage_batch_operations.CreateJobRequest(
@@ -2215,7 +2215,7 @@ def test_delete_job_non_empty_request_with_auto_populated_field():
         call.assert_called()
         _, args, _ = call.mock_calls[0]
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
+        assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
         # clear UUID field so that the check below succeeds
         args[0].request_id = None
         assert args[0] == storage_batch_operations.DeleteJobRequest(
@@ -2533,7 +2533,7 @@ def test_cancel_job_non_empty_request_with_auto_populated_field():
         call.assert_called()
         _, args, _ = call.mock_calls[0]
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
+        assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
         # clear UUID field so that the check below succeeds
         args[0].request_id = None
         assert args[0] == storage_batch_operations.CancelJobRequest(
@@ -4135,7 +4135,7 @@ def test_create_job_rest_required_fields(request_type=storage_batch_operations.C
             # Ensure that the uuid4 field is set according to AIP 4235
             for i, (key, value) in enumerate(req.call_args.kwargs['params']):
                 if key == "requestId":
-                    assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", value)
+                    assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", value)
                     break
 
             # Include requestId within expected_params with value mock.ANY
@@ -4313,7 +4313,7 @@ def test_delete_job_rest_required_fields(request_type=storage_batch_operations.D
             # Ensure that the uuid4 field is set according to AIP 4235
             for i, (key, value) in enumerate(req.call_args.kwargs['params']):
                 if key == "requestId":
-                    assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", value)
+                    assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", value)
                     break
 
             # Include requestId within expected_params with value mock.ANY
@@ -4489,7 +4489,7 @@ def test_cancel_job_rest_required_fields(request_type=storage_batch_operations.C
             # Ensure that the uuid4 field is set according to AIP 4235
             for i, (key, value) in enumerate(req.call_args.kwargs['params']):
                 if key == "requestId":
-                    assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", value)
+                    assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", value)
                     break
 
             # Include requestId within expected_params with value mock.ANY
@@ -5125,7 +5125,7 @@ def test_create_job_empty_call_grpc():
         call.assert_called()
         _, args, _ = call.mock_calls[0]
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
+        assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
         # clear UUID field so that the check below succeeds
         args[0].request_id = None
         request_msg = storage_batch_operations.CreateJobRequest()
@@ -5152,7 +5152,7 @@ def test_delete_job_empty_call_grpc():
         call.assert_called()
         _, args, _ = call.mock_calls[0]
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
+        assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
         # clear UUID field so that the check below succeeds
         args[0].request_id = None
         request_msg = storage_batch_operations.DeleteJobRequest()
@@ -5179,7 +5179,7 @@ def test_cancel_job_empty_call_grpc():
         call.assert_called()
         _, args, _ = call.mock_calls[0]
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
+        assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
         # clear UUID field so that the check below succeeds
         args[0].request_id = None
         request_msg = storage_batch_operations.CancelJobRequest()
@@ -5330,7 +5330,7 @@ async def test_create_job_empty_call_grpc_asyncio():
         call.assert_called()
         _, args, _ = call.mock_calls[0]
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
+        assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
         # clear UUID field so that the check below succeeds
         args[0].request_id = None
         request_msg = storage_batch_operations.CreateJobRequest()
@@ -5359,7 +5359,7 @@ async def test_delete_job_empty_call_grpc_asyncio():
         call.assert_called()
         _, args, _ = call.mock_calls[0]
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
+        assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
         # clear UUID field so that the check below succeeds
         args[0].request_id = None
         request_msg = storage_batch_operations.DeleteJobRequest()
@@ -5389,7 +5389,7 @@ async def test_cancel_job_empty_call_grpc_asyncio():
         call.assert_called()
         _, args, _ = call.mock_calls[0]
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
+        assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
         # clear UUID field so that the check below succeeds
         args[0].request_id = None
         request_msg = storage_batch_operations.CancelJobRequest()
@@ -6647,7 +6647,7 @@ def test_create_job_empty_call_rest():
         call.assert_called()
         _, args, _ = call.mock_calls[0]
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
+        assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
         # clear UUID field so that the check below succeeds
         args[0].request_id = None
         request_msg = storage_batch_operations.CreateJobRequest()
@@ -6673,7 +6673,7 @@ def test_delete_job_empty_call_rest():
         call.assert_called()
         _, args, _ = call.mock_calls[0]
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
+        assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
         # clear UUID field so that the check below succeeds
         args[0].request_id = None
         request_msg = storage_batch_operations.DeleteJobRequest()
@@ -6699,7 +6699,7 @@ def test_cancel_job_empty_call_rest():
         call.assert_called()
         _, args, _ = call.mock_calls[0]
         # Ensure that the uuid4 field is set according to AIP 4235
-        assert re.match(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
+        assert re.fullmatch(r"[a-f0-9]{8}-?[a-f0-9]{4}-?4[a-f0-9]{3}-?[89ab][a-f0-9]{3}-?[a-f0-9]{12}", args[0].request_id)
         # clear UUID field so that the check below succeeds
         args[0].request_id = None
         request_msg = storage_batch_operations.CancelJobRequest()