diff --git a/README.md b/README.md
index ee2d3069f1..08735dc791 100644
--- a/README.md
+++ b/README.md
@@ -49,20 +49,20 @@ If you are using Maven without BOM, add this to your dependencies:
 If you are using Gradle 5.x or later, add this to your dependencies:
 
 ```Groovy
-implementation platform('com.google.cloud:libraries-bom:26.8.0')
+implementation platform('com.google.cloud:libraries-bom:26.9.0')
 
 implementation 'com.google.cloud:google-cloud-bigquerystorage'
 ```
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-bigquerystorage:2.32.0'
+implementation 'com.google.cloud:google-cloud-bigquerystorage:2.32.1'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-bigquerystorage" % "2.32.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-bigquerystorage" % "2.32.1"
 ```
 
 ## Authentication
diff --git a/google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1/StreamWriter.java b/google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1/StreamWriter.java
index ff965f0477..ffc1290a78 100644
--- a/google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1/StreamWriter.java
+++ b/google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1/StreamWriter.java
@@ -308,17 +308,37 @@ static boolean isDefaultStream(String streamName) {
     return streamMatcher.find();
   }
 
-  private BigQueryWriteSettings getBigQueryWriteSettings(Builder builder) throws IOException {
+  static BigQueryWriteSettings getBigQueryWriteSettings(Builder builder) throws IOException {
+    BigQueryWriteSettings.Builder settingsBuilder = null;
     if (builder.client != null) {
-      return builder.client.getSettings();
+      settingsBuilder = builder.client.getSettings().toBuilder();
     } else {
-      return BigQueryWriteSettings.newBuilder()
-          .setCredentialsProvider(builder.credentialsProvider)
-          .setTransportChannelProvider(builder.channelProvider)
-          .setBackgroundExecutorProvider(builder.executorProvider)
-          .setEndpoint(builder.endpoint)
-          .build();
+      settingsBuilder =
+          new BigQueryWriteSettings.Builder()
+              .setTransportChannelProvider(
+                  BigQueryWriteSettings.defaultGrpcTransportProviderBuilder()
+                      .setChannelsPerCpu(1)
+                      .build())
+              .setCredentialsProvider(
+                  BigQueryWriteSettings.defaultCredentialsProviderBuilder().build())
+              .setBackgroundExecutorProvider(
+                  BigQueryWriteSettings.defaultExecutorProviderBuilder().build())
+              .setEndpoint(BigQueryWriteSettings.getDefaultEndpoint());
     }
+    if (builder.channelProvider != null) {
+      settingsBuilder.setTransportChannelProvider(builder.channelProvider);
+    }
+    if (builder.credentialsProvider != null) {
+      settingsBuilder.setCredentialsProvider(builder.credentialsProvider);
+    }
+    if (builder.executorProvider != null) {
+      settingsBuilder.setBackgroundExecutorProvider(builder.executorProvider);
+    }
+    if (builder.endpoint != null) {
+      settingsBuilder.setEndpoint(builder.endpoint);
+    }
+
+    return settingsBuilder.build();
   }
 
   // Validate whether the fetched connection pool matched certain properties.
@@ -542,16 +562,13 @@ public static final class Builder {
 
     private long maxInflightBytes = DEFAULT_MAX_INFLIGHT_BYTES;
 
-    private String endpoint = BigQueryWriteSettings.getDefaultEndpoint();
+    private String endpoint = null;
 
-    private TransportChannelProvider channelProvider =
-        BigQueryWriteSettings.defaultGrpcTransportProviderBuilder().setChannelsPerCpu(1).build();
+    private TransportChannelProvider channelProvider = null;
 
-    private CredentialsProvider credentialsProvider =
-        BigQueryWriteSettings.defaultCredentialsProviderBuilder().build();
+    private CredentialsProvider credentialsProvider = null;
 
-    private ExecutorProvider executorProvider =
-        BigQueryWriteSettings.defaultExecutorProviderBuilder().build();
+    private ExecutorProvider executorProvider = null;
 
     private FlowController.LimitExceededBehavior limitExceededBehavior =
         FlowController.LimitExceededBehavior.Block;
@@ -633,7 +650,8 @@ public Builder setCredentialsProvider(CredentialsProvider credentialsProvider) {
 
     /** {@code ExecutorProvider} to use to create Executor to run background jobs. */
     public Builder setExecutorProvider(ExecutorProvider executorProvider) {
-      this.executorProvider = executorProvider;
+      this.executorProvider =
+          Preconditions.checkNotNull(executorProvider, "ExecutorProvider is null.");
       return this;
     }
 
diff --git a/google-cloud-bigquerystorage/src/test/java/com/google/cloud/bigquery/storage/v1/StreamWriterTest.java b/google-cloud-bigquerystorage/src/test/java/com/google/cloud/bigquery/storage/v1/StreamWriterTest.java
index 43c5fd2bea..af36273102 100644
--- a/google-cloud-bigquerystorage/src/test/java/com/google/cloud/bigquery/storage/v1/StreamWriterTest.java
+++ b/google-cloud-bigquerystorage/src/test/java/com/google/cloud/bigquery/storage/v1/StreamWriterTest.java
@@ -25,7 +25,10 @@
 import com.google.api.core.ApiFutureCallback;
 import com.google.api.core.ApiFutures;
 import com.google.api.gax.batching.FlowController;
+import com.google.api.gax.core.GoogleCredentialsProvider;
+import com.google.api.gax.core.InstantiatingExecutorProvider;
 import com.google.api.gax.core.NoCredentialsProvider;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
 import com.google.api.gax.grpc.testing.MockGrpcService;
 import com.google.api.gax.grpc.testing.MockServiceHelper;
 import com.google.api.gax.rpc.AbortedException;
@@ -1366,4 +1369,79 @@ public void testStreamWriterPermanentErrorNoMultiplexing() throws Exception {
     assertTrue(ex.getCause() instanceof InvalidArgumentException);
     assertFalse(writer.isUserClosed());
   }
+
+  @Test(timeout = 10000)
+  public void testBuilderDefaultSetting() throws Exception {
+    StreamWriter.Builder writerBuilder = StreamWriter.newBuilder(TEST_STREAM_1);
+    BigQueryWriteSettings writeSettings = StreamWriter.getBigQueryWriteSettings(writerBuilder);
+    assertEquals(
+        BigQueryWriteSettings.defaultExecutorProviderBuilder().build().toString(),
+        writeSettings.getBackgroundExecutorProvider().toString());
+    assertEquals(
+        BigQueryWriteSettings.defaultCredentialsProviderBuilder().build().toString(),
+        writeSettings.getCredentialsProvider().toString());
+    assertTrue(
+        writeSettings.getTransportChannelProvider() instanceof InstantiatingGrpcChannelProvider);
+    assertEquals(
+        BigQueryWriteSettings.getDefaultEndpoint(), writeSettings.getEndpoint().toString());
+  }
+
+  @Test(timeout = 10000)
+  public void testBuilderExplicitSetting() throws Exception {
+    // Client has special seetings.
+    BigQueryWriteSettings clientSettings =
+        BigQueryWriteSettings.newBuilder()
+            .setEndpoint("xxx:345")
+            .setBackgroundExecutorProvider(
+                InstantiatingExecutorProvider.newBuilder().setExecutorThreadCount(4).build())
+            .setTransportChannelProvider(serviceHelper.createChannelProvider())
+            .setCredentialsProvider(NoCredentialsProvider.create())
+            .build();
+    BigQueryWriteClient client = BigQueryWriteClient.create(clientSettings);
+    StreamWriter.Builder writerWithClient = StreamWriter.newBuilder(TEST_STREAM_1, client);
+    BigQueryWriteSettings writerSettings = StreamWriter.getBigQueryWriteSettings(writerWithClient);
+    assertEquals("xxx:345", writerSettings.getEndpoint());
+    assertTrue(
+        writerSettings.getBackgroundExecutorProvider() instanceof InstantiatingExecutorProvider);
+    assertEquals(
+        4,
+        ((InstantiatingExecutorProvider) writerSettings.getBackgroundExecutorProvider())
+            .getExecutorThreadCount());
+
+    // Explicit setting on StreamWriter is respected.
+    StreamWriter.Builder writerWithClientWithOverrides =
+        StreamWriter.newBuilder(TEST_STREAM_1, client)
+            .setEndpoint("yyy:345")
+            .setExecutorProvider(
+                InstantiatingExecutorProvider.newBuilder().setExecutorThreadCount(14).build())
+            .setChannelProvider(
+                BigQueryWriteSettings.defaultGrpcTransportProviderBuilder()
+                    .setKeepAliveTimeout(Duration.ofSeconds(500))
+                    .build())
+            .setCredentialsProvider(
+                BigQueryWriteSettings.defaultCredentialsProviderBuilder()
+                    .setScopesToApply(Arrays.asList("A", "B"))
+                    .build());
+    BigQueryWriteSettings writerSettings2 =
+        StreamWriter.getBigQueryWriteSettings(writerWithClientWithOverrides);
+    assertEquals("yyy:345", writerSettings2.getEndpoint());
+    assertTrue(
+        writerSettings2.getBackgroundExecutorProvider() instanceof InstantiatingExecutorProvider);
+    assertEquals(
+        14,
+        ((InstantiatingExecutorProvider) writerSettings2.getBackgroundExecutorProvider())
+            .getExecutorThreadCount());
+    assertTrue(
+        writerSettings2.getTransportChannelProvider() instanceof InstantiatingGrpcChannelProvider);
+    assertEquals(
+        Duration.ofSeconds(500),
+        ((InstantiatingGrpcChannelProvider) writerSettings2.getTransportChannelProvider())
+            .getKeepAliveTimeout());
+    assertTrue(writerSettings2.getCredentialsProvider() instanceof GoogleCredentialsProvider);
+    assertEquals(
+        2,
+        ((GoogleCredentialsProvider) writerSettings2.getCredentialsProvider())
+            .getScopesToApply()
+            .size());
+  }
 }