diff --git a/packages/google-cloud-texttospeech/noxfile.py b/packages/google-cloud-texttospeech/noxfile.py
index a2eefbb6765f..7949a4e3925a 100644
--- a/packages/google-cloud-texttospeech/noxfile.py
+++ b/packages/google-cloud-texttospeech/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-texttospeech/synth.metadata b/packages/google-cloud-texttospeech/synth.metadata
index 6693fa09bf3d..1cda864fe85e 100644
--- a/packages/google-cloud-texttospeech/synth.metadata
+++ b/packages/google-cloud-texttospeech/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-11-12T13:43:15.938996Z",
+  "updateTime": "2019-12-07T13:28:50.209282Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.41.1",
-        "dockerImage": "googleapis/artman@sha256:545c758c76c3f779037aa259023ec3d1ef2d57d2c8cd00a222cb187d63ceac5e"
+        "version": "0.42.1",
+        "dockerImage": "googleapis/artman@sha256:c773192618c608a7a0415dd95282f841f8e6bcdef7dd760a988c93b77a64bd57"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "f69562be0608904932bdcfbc5ad8b9a22d9dceb8",
-        "internalRef": "279774957"
+        "sha": "a4adac3a12aca6e3a792c9c35ee850435fe7cf7e",
+        "internalRef": "284277770"
       }
     },
     {