diff --git a/api_core/nox.py b/api_core/nox.py
index de9726dc2cb1..7b40c6821023 100644
--- a/api_core/nox.py
+++ b/api_core/nox.py
@@ -52,7 +52,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/bigquery/nox.py b/bigquery/nox.py
index 29dead9ac43d..bcf20c077f53 100644
--- a/bigquery/nox.py
+++ b/bigquery/nox.py
@@ -65,7 +65,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/bigquery_datatransfer/nox.py b/bigquery_datatransfer/nox.py
index 479c2f806ea1..c59f64b19e2f 100644
--- a/bigquery_datatransfer/nox.py
+++ b/bigquery_datatransfer/nox.py
@@ -53,7 +53,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/bigtable/nox.py b/bigtable/nox.py
index f8bfb4b33c8a..3b9a2aad12f4 100644
--- a/bigtable/nox.py
+++ b/bigtable/nox.py
@@ -53,7 +53,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/container/nox.py b/container/nox.py
index a27947c54163..2da528928e6c 100644
--- a/container/nox.py
+++ b/container/nox.py
@@ -53,7 +53,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/core/nox.py b/core/nox.py
index 5f978a52cf24..14091489942b 100644
--- a/core/nox.py
+++ b/core/nox.py
@@ -58,7 +58,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/dataproc/nox.py b/dataproc/nox.py
index d2ac8f18b2ab..298196b30399 100644
--- a/dataproc/nox.py
+++ b/dataproc/nox.py
@@ -53,7 +53,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/datastore/nox.py b/datastore/nox.py
index 1c825175a3bc..f6a123835a5f 100644
--- a/datastore/nox.py
+++ b/datastore/nox.py
@@ -54,7 +54,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/dlp/nox.py b/dlp/nox.py
index 6631ec884d32..896c6a2363be 100644
--- a/dlp/nox.py
+++ b/dlp/nox.py
@@ -50,7 +50,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/dns/nox.py b/dns/nox.py
index 0e25875fbdc4..e51b1af74017 100644
--- a/dns/nox.py
+++ b/dns/nox.py
@@ -53,7 +53,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/error_reporting/nox.py b/error_reporting/nox.py
index e03cc2ac29c6..c736b1676673 100644
--- a/error_reporting/nox.py
+++ b/error_reporting/nox.py
@@ -54,7 +54,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/firestore/nox.py b/firestore/nox.py
index 0e26db247967..d841a999caab 100644
--- a/firestore/nox.py
+++ b/firestore/nox.py
@@ -56,7 +56,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/language/nox.py b/language/nox.py
index 0a9b26e4753f..6b070d9c2e5b 100644
--- a/language/nox.py
+++ b/language/nox.py
@@ -53,7 +53,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/logging/nox.py b/logging/nox.py
index a824c4ec866d..c02870ba753b 100644
--- a/logging/nox.py
+++ b/logging/nox.py
@@ -72,7 +72,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/monitoring/nox.py b/monitoring/nox.py
index 900f88742595..a22dd18a7a5e 100644
--- a/monitoring/nox.py
+++ b/monitoring/nox.py
@@ -58,7 +58,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/oslogin/nox.py b/oslogin/nox.py
index 180dfc19fe88..58f8c2b507ce 100644
--- a/oslogin/nox.py
+++ b/oslogin/nox.py
@@ -24,7 +24,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/pubsub/google/cloud/pubsub_v1/subscriber/scheduler.py b/pubsub/google/cloud/pubsub_v1/subscriber/scheduler.py
index 17e2c2f967ce..70c3721249f9 100644
--- a/pubsub/google/cloud/pubsub_v1/subscriber/scheduler.py
+++ b/pubsub/google/cloud/pubsub_v1/subscriber/scheduler.py
@@ -118,5 +118,9 @@ def shutdown(self):
         # Drop all pending item from the executor. Without this, the executor
         # will block until all pending items are complete, which is
         # undesirable.
-        self._executor._work_queue.queue.clear()
+        try:
+            while True:
+                self._executor._work_queue.get(block=False)
+        except queue.Empty:
+            pass
         self._executor.shutdown()
diff --git a/pubsub/nox.py b/pubsub/nox.py
index d544f2eef081..7deabf7dbfd0 100644
--- a/pubsub/nox.py
+++ b/pubsub/nox.py
@@ -53,7 +53,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/resource_manager/nox.py b/resource_manager/nox.py
index 5538d7ba4287..a7d69a3bf92a 100644
--- a/resource_manager/nox.py
+++ b/resource_manager/nox.py
@@ -53,7 +53,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/runtimeconfig/nox.py b/runtimeconfig/nox.py
index 184411511b62..7899d19c51d5 100644
--- a/runtimeconfig/nox.py
+++ b/runtimeconfig/nox.py
@@ -53,7 +53,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/speech/nox.py b/speech/nox.py
index bc00c68c3c3f..9932ac3e295f 100644
--- a/speech/nox.py
+++ b/speech/nox.py
@@ -51,7 +51,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/storage/nox.py b/storage/nox.py
index 4354f9f5d816..64967185e939 100644
--- a/storage/nox.py
+++ b/storage/nox.py
@@ -54,7 +54,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/texttospeech/nox.py b/texttospeech/nox.py
index 180dfc19fe88..58f8c2b507ce 100644
--- a/texttospeech/nox.py
+++ b/texttospeech/nox.py
@@ -24,7 +24,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/trace/nox.py b/trace/nox.py
index 2aa58029c027..248b09e7b428 100644
--- a/trace/nox.py
+++ b/trace/nox.py
@@ -53,7 +53,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/translate/nox.py b/translate/nox.py
index 2874a91796ca..c8e3a6e48c0a 100644
--- a/translate/nox.py
+++ b/translate/nox.py
@@ -48,7 +48,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/videointelligence/nox.py b/videointelligence/nox.py
index 333316017caf..534cd7705c0a 100644
--- a/videointelligence/nox.py
+++ b/videointelligence/nox.py
@@ -35,7 +35,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/vision/nox.py b/vision/nox.py
index 3ec93a36f47a..73434d095b2c 100644
--- a/vision/nox.py
+++ b/vision/nox.py
@@ -53,7 +53,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""
 
diff --git a/websecurityscanner/nox.py b/websecurityscanner/nox.py
index ae8e1aa53a30..af0b460c33a5 100644
--- a/websecurityscanner/nox.py
+++ b/websecurityscanner/nox.py
@@ -51,7 +51,7 @@ def default(session):
 
 
 @nox.session
-@nox.parametrize('py', ['2.7', '3.4', '3.5', '3.6'])
+@nox.parametrize('py', ['2.7', '3.5', '3.6', '3.7'])
 def unit(session, py):
     """Run the unit test suite."""