diff --git a/tests/unit/gapic/recommendationengine_v1beta1/test_catalog_service.py b/tests/unit/gapic/recommendationengine_v1beta1/test_catalog_service.py
index 164045bf..a1e4a16a 100644
--- a/tests/unit/gapic/recommendationengine_v1beta1/test_catalog_service.py
+++ b/tests/unit/gapic/recommendationengine_v1beta1/test_catalog_service.py
@@ -14,7 +14,13 @@
 # limitations under the License.
 #
 import os
-import mock
+
+# try/except added for compatibility with python < 3.8
+try:
+    from unittest import mock
+    from unittest.mock import AsyncMock
+except ImportError:
+    import mock
 
 import grpc
 from grpc.experimental import aio
diff --git a/tests/unit/gapic/recommendationengine_v1beta1/test_prediction_api_key_registry.py b/tests/unit/gapic/recommendationengine_v1beta1/test_prediction_api_key_registry.py
index 2a06dad1..01a81365 100644
--- a/tests/unit/gapic/recommendationengine_v1beta1/test_prediction_api_key_registry.py
+++ b/tests/unit/gapic/recommendationengine_v1beta1/test_prediction_api_key_registry.py
@@ -14,7 +14,13 @@
 # limitations under the License.
 #
 import os
-import mock
+
+# try/except added for compatibility with python < 3.8
+try:
+    from unittest import mock
+    from unittest.mock import AsyncMock
+except ImportError:
+    import mock
 
 import grpc
 from grpc.experimental import aio
diff --git a/tests/unit/gapic/recommendationengine_v1beta1/test_prediction_service.py b/tests/unit/gapic/recommendationengine_v1beta1/test_prediction_service.py
index e4ba87eb..3d7c53d4 100644
--- a/tests/unit/gapic/recommendationengine_v1beta1/test_prediction_service.py
+++ b/tests/unit/gapic/recommendationengine_v1beta1/test_prediction_service.py
@@ -14,7 +14,13 @@
 # limitations under the License.
 #
 import os
-import mock
+
+# try/except added for compatibility with python < 3.8
+try:
+    from unittest import mock
+    from unittest.mock import AsyncMock
+except ImportError:
+    import mock
 
 import grpc
 from grpc.experimental import aio
diff --git a/tests/unit/gapic/recommendationengine_v1beta1/test_user_event_service.py b/tests/unit/gapic/recommendationengine_v1beta1/test_user_event_service.py
index a685ca59..526e791e 100644
--- a/tests/unit/gapic/recommendationengine_v1beta1/test_user_event_service.py
+++ b/tests/unit/gapic/recommendationengine_v1beta1/test_user_event_service.py
@@ -14,7 +14,13 @@
 # limitations under the License.
 #
 import os
-import mock
+
+# try/except added for compatibility with python < 3.8
+try:
+    from unittest import mock
+    from unittest.mock import AsyncMock
+except ImportError:
+    import mock
 
 import grpc
 from grpc.experimental import aio