diff --git a/.kokoro/build.sh b/.kokoro/build.sh
index f1ae58408..d11958c5a 100755
--- a/.kokoro/build.sh
+++ b/.kokoro/build.sh
@@ -62,14 +62,21 @@ integration)
     bash .kokoro/coerce_logs.sh
     ;;
 samples)
-    mvn -B \
-      -Penable-samples \
-      -DtrimStackTrace=false \
-      -Dclirr.skip=true \
-      -Denforcer.skip=true \
-      -fae \
-      verify
-    bash .kokoro/coerce_logs.sh
+    if [[ -f samples/pom.xml ]]
+    then
+        pushd samples
+        mvn -B \
+          -Penable-samples \
+          -DtrimStackTrace=false \
+          -Dclirr.skip=true \
+          -Denforcer.skip=true \
+          -fae \
+          verify
+        bash .kokoro/coerce_logs.sh
+        popd
+    else
+        echo "no sample pom.xml found - skipping sample tests"
+    fi
     ;;
 clirr)
     mvn -B -Denforcer.skip=true clirr:check
diff --git a/synth.metadata b/synth.metadata
index 268cbefe1..f22bb1f60 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -1,11 +1,25 @@
 {
-  "updateTime": "2020-02-01T08:32:23.466071Z",
+  "updateTime": "2020-02-21T22:34:12.927328Z",
   "sources": [
+    {
+      "git": {
+        "name": ".",
+        "remote": "https://github.com/googleapis/google-oauth-java-client.git",
+        "sha": "bcabce25df8b7dc9d3d0edfca009d47a465d1af3"
+      }
+    },
+    {
+      "git": {
+        "name": "synthtool",
+        "remote": "rpc://devrel/cloud/libraries/tools/autosynth",
+        "sha": "706a38c26db42299845396cdae55db635c38794a"
+      }
+    },
     {
       "template": {
         "name": "java_library",
         "origin": "synthtool.gcp",
-        "version": "2019.10.17"
+        "version": "2020.2.4"
       }
     }
   ]