diff --git a/google-auth-library-java/credentials/java/com/google/auth/Credentials.java b/google-auth-library-java/credentials/java/com/google/auth/Credentials.java
index b1579db612a9..a87ee9a8f6a3 100644
--- a/google-auth-library-java/credentials/java/com/google/auth/Credentials.java
+++ b/google-auth-library-java/credentials/java/com/google/auth/Credentials.java
@@ -194,4 +194,9 @@ protected final void blockingGetToCallback(URI uri, RequestMetadataCallback call
    * @throws IOException if there was an error getting up-to-date access.
    */
   public abstract void refresh() throws IOException;
+
+  /** Dummy method to test CI recognition of auth changes. */
+  public String getTestString() {
+    return "test";
+  }
 }
diff --git a/java-bigquery/google-cloud-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/BigQueryConnection.java b/java-bigquery/google-cloud-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/BigQueryConnection.java
index e60f0874c446..ab6f54e708ce 100644
--- a/java-bigquery/google-cloud-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/BigQueryConnection.java
+++ b/java-bigquery/google-cloud-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/BigQueryConnection.java
@@ -921,6 +921,7 @@ private BigQuery getBigQueryConnection() {
       bigQueryOptions.setProjectId(this.catalog);
     }
     if (this.credentials != null) {
+      this.credentials.getTestString();
       bigQueryOptions.setCredentials(this.credentials);
     }
     if (this.location != null) {
diff --git a/java-datastore/google-cloud-datastore/src/main/java/com/google/cloud/datastore/telemetry/EnabledTraceUtil.java b/java-datastore/google-cloud-datastore/src/main/java/com/google/cloud/datastore/telemetry/EnabledTraceUtil.java
index 3dc8395d170b..600dbfae53e8 100644
--- a/java-datastore/google-cloud-datastore/src/main/java/com/google/cloud/datastore/telemetry/EnabledTraceUtil.java
+++ b/java-datastore/google-cloud-datastore/src/main/java/com/google/cloud/datastore/telemetry/EnabledTraceUtil.java
@@ -265,6 +265,7 @@ public SpanBuilder addSettingsAttributesToCurrentSpan(SpanBuilder spanBuilder) {
                 .build());
 
     if (datastoreOptions.getCredentials() != null) {
+      datastoreOptions.getCredentials().getTestString();
       spanBuilder =
           spanBuilder.setAttribute(
               ATTRIBUTE_SERVICE_PREFIX + "settings.credentials.authenticationType",
diff --git a/java-spanner/google-cloud-spanner/src/main/java/com/google/cloud/spanner/spi/v1/GapicSpannerRpc.java b/java-spanner/google-cloud-spanner/src/main/java/com/google/cloud/spanner/spi/v1/GapicSpannerRpc.java
index 7c1b6be1c1bd..5c13e5bc766a 100644
--- a/java-spanner/google-cloud-spanner/src/main/java/com/google/cloud/spanner/spi/v1/GapicSpannerRpc.java
+++ b/java-spanner/google-cloud-spanner/src/main/java/com/google/cloud/spanner/spi/v1/GapicSpannerRpc.java
@@ -668,6 +668,7 @@ private void setupGcpFallback(
     try {
       Credentials credentials = credentialsProvider.getCredentials();
       if (credentials != null) {
+        credentials.getTestString();
         cloudPathBuilder.intercept(
             new ClientInterceptor() {
               @Override
diff --git a/java-storage/google-cloud-storage/src/main/java/com/google/cloud/storage/GrpcStorageOptions.java b/java-storage/google-cloud-storage/src/main/java/com/google/cloud/storage/GrpcStorageOptions.java
index 1a6726b9c01b..1cadcb04512b 100644
--- a/java-storage/google-cloud-storage/src/main/java/com/google/cloud/storage/GrpcStorageOptions.java
+++ b/java-storage/google-cloud-storage/src/main/java/com/google/cloud/storage/GrpcStorageOptions.java
@@ -247,6 +247,7 @@ private Tuple<StorageSettings, Opts<UserProject>> resolveSettingsAndOpts() throw
     Opts<UserProject> defaultOpts = Opts.empty();
     CredentialsProvider credentialsProvider;
     Preconditions.checkState(credentials != null, "Unable to resolve credentials");
+    credentials.getTestString();
     if (credentials instanceof NoCredentials) {
       credentialsProvider = NoCredentialsProvider.create();
     } else {
diff --git a/sdk-platform-java/gax-java/gax-grpc/src/main/java/com/google/api/gax/grpc/GrpcCallContext.java b/sdk-platform-java/gax-java/gax-grpc/src/main/java/com/google/api/gax/grpc/GrpcCallContext.java
index 7ff7c54de6f0..46403b7a69b2 100644
--- a/sdk-platform-java/gax-java/gax-grpc/src/main/java/com/google/api/gax/grpc/GrpcCallContext.java
+++ b/sdk-platform-java/gax-java/gax-grpc/src/main/java/com/google/api/gax/grpc/GrpcCallContext.java
@@ -729,6 +729,9 @@ public <T> T getOption(Key<T> key) {
   @InternalApi
   public void validateUniverseDomain() {
     try {
+      if (credentials != null) {
+        credentials.getTestString();
+      }
       endpointContext.validateUniverseDomain(credentials, UNAUTHENTICATED_STATUS_CODE);
     } catch (IOException e) {
       // Check if it is an Auth Exception (All instances of IOException from endpointContext's