diff --git a/spring-cloud-gcp-dependencies/pom.xml b/spring-cloud-gcp-dependencies/pom.xml
index ed89313a79..5792c8afb6 100644
--- a/spring-cloud-gcp-dependencies/pom.xml
+++ b/spring-cloud-gcp-dependencies/pom.xml
@@ -34,7 +34,7 @@
 	</distributionManagement>
 
 	<properties>
-		<gcp-libraries-bom.version>26.51.0</gcp-libraries-bom.version>
+		<gcp-libraries-bom.version>26.52.0</gcp-libraries-bom.version>
 		<cloud-sql-socket-factory.version>1.21.0</cloud-sql-socket-factory.version>
 		<r2dbc-postgres-driver.version>1.0.7.RELEASE</r2dbc-postgres-driver.version>
 		<cloud-spanner-r2dbc.version>1.3.0</cloud-spanner-r2dbc.version>
diff --git a/spring-cloud-gcp-pubsub/src/test/java/com/google/cloud/spring/pubsub/support/DefaultPublisherFactoryTests.java b/spring-cloud-gcp-pubsub/src/test/java/com/google/cloud/spring/pubsub/support/DefaultPublisherFactoryTests.java
index 71b94953a1..1fc4e7df42 100644
--- a/spring-cloud-gcp-pubsub/src/test/java/com/google/cloud/spring/pubsub/support/DefaultPublisherFactoryTests.java
+++ b/spring-cloud-gcp-pubsub/src/test/java/com/google/cloud/spring/pubsub/support/DefaultPublisherFactoryTests.java
@@ -19,7 +19,6 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.ArgumentMatchers.anyBoolean;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
@@ -47,7 +46,6 @@ public void setUp() throws IOException {
     factory.setCredentialsProvider(NoCredentialsProvider.create());
     TransportChannelProvider mockChannelProvider = mock(TransportChannelProvider.class);
     TransportChannel mockTransportChannel = mock(TransportChannel.class);
-    when(mockChannelProvider.withUseS2A(anyBoolean())).thenReturn(mockChannelProvider);
     when(mockChannelProvider.getTransportChannel()).thenReturn(mockTransportChannel);
     ApiCallContext mockContext = mock(ApiCallContext.class);
     when(mockTransportChannel.getEmptyCallContext()).thenReturn(mockContext);
diff --git a/spring-cloud-gcp-pubsub/src/test/java/com/google/cloud/spring/pubsub/support/DefaultSubscriberFactoryTests.java b/spring-cloud-gcp-pubsub/src/test/java/com/google/cloud/spring/pubsub/support/DefaultSubscriberFactoryTests.java
index 786c25791d..78ea14b328 100644
--- a/spring-cloud-gcp-pubsub/src/test/java/com/google/cloud/spring/pubsub/support/DefaultSubscriberFactoryTests.java
+++ b/spring-cloud-gcp-pubsub/src/test/java/com/google/cloud/spring/pubsub/support/DefaultSubscriberFactoryTests.java
@@ -381,9 +381,9 @@ void testCreateSubscriber_validateSetProperties() {
     assertThat(expectedSubscriber.getFlowControlSettings().getLimitExceededBehavior())
         .isEqualTo(FlowController.LimitExceededBehavior.Ignore);
     assertThat(expectedSubscriber)
-        .hasFieldOrPropertyWithValue("maxAckExtensionPeriod", Duration.ofSeconds(2L))
-        .hasFieldOrPropertyWithValue("minDurationPerAckExtension", Duration.ofSeconds(3L))
-        .hasFieldOrPropertyWithValue("maxDurationPerAckExtension", Duration.ofSeconds(4L))
+        .hasFieldOrPropertyWithValue("maxAckExtensionPeriod", java.time.Duration.ofSeconds(2L))
+        .hasFieldOrPropertyWithValue("minDurationPerAckExtension", java.time.Duration.ofSeconds(3L))
+        .hasFieldOrPropertyWithValue("maxDurationPerAckExtension", java.time.Duration.ofSeconds(4L))
         .hasFieldOrPropertyWithValue("numPullers", 2)
         .hasFieldOrPropertyWithValue("subStubSettings.endpoint", "test.endpoint");
   }
diff --git a/spring-cloud-previews/google-cloud-language-spring-starter/src/test/java/com/google/cloud/language/v2/spring/LanguageAutoConfigurationTests.java b/spring-cloud-previews/google-cloud-language-spring-starter/src/test/java/com/google/cloud/language/v2/spring/LanguageAutoConfigurationTests.java
index 0f874a0330..723bc15cee 100644
--- a/spring-cloud-previews/google-cloud-language-spring-starter/src/test/java/com/google/cloud/language/v2/spring/LanguageAutoConfigurationTests.java
+++ b/spring-cloud-previews/google-cloud-language-spring-starter/src/test/java/com/google/cloud/language/v2/spring/LanguageAutoConfigurationTests.java
@@ -197,8 +197,6 @@ void testExecutorThreadCountFromProperties() {
   void testCustomTransportChannelProviderUsedWhenProvided() throws IOException {
     when(mockTransportChannelProvider.getTransportName()).thenReturn("grpc");
     when(mockTransportChannelProvider.getTransportChannel()).thenReturn(mockTransportChannel);
-    when(mockTransportChannelProvider.withUseS2A(anyBoolean()))
-        .thenReturn(mockTransportChannelProvider);
     when(mockTransportChannel.getEmptyCallContext()).thenReturn(mockApiCallContext);
     when(mockApiCallContext.withCredentials(any())).thenReturn(mockApiCallContext);
     when(mockApiCallContext.withTransportChannel(any())).thenReturn(mockApiCallContext);