diff --git a/packages/google-cloud-iam/noxfile.py b/packages/google-cloud-iam/noxfile.py
index a2eefbb6765f..7949a4e3925a 100644
--- a/packages/google-cloud-iam/noxfile.py
+++ b/packages/google-cloud-iam/noxfile.py
@@ -86,7 +86,7 @@ def default(session):
     )
 
 
-@nox.session(python=["2.7", "3.5", "3.6", "3.7"])
+@nox.session(python=["2.7", "3.5", "3.6", "3.7", "3.8"])
 def unit(session):
     """Run the unit test suite."""
     default(session)
diff --git a/packages/google-cloud-iam/synth.metadata b/packages/google-cloud-iam/synth.metadata
index e1df6f7c68db..ab7d0fe13add 100644
--- a/packages/google-cloud-iam/synth.metadata
+++ b/packages/google-cloud-iam/synth.metadata
@@ -1,5 +1,5 @@
 {
-  "updateTime": "2019-11-20T13:22:23.594534Z",
+  "updateTime": "2019-12-07T13:19:37.502856Z",
   "sources": [
     {
       "generator": {
@@ -12,8 +12,8 @@
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "16543773103e2619d2b5f52456264de5bb9be104",
-        "internalRef": "281423227"
+        "sha": "a4adac3a12aca6e3a792c9c35ee850435fe7cf7e",
+        "internalRef": "284277770"
       }
     },
     {