diff --git a/java-spanner/google-cloud-spanner/src/test/java/com/google/cloud/spanner/BuiltInOpenTelemetryMetricsProviderTest.java b/java-spanner/google-cloud-spanner/src/test/java/com/google/cloud/spanner/BuiltInOpenTelemetryMetricsProviderTest.java
index 1f2adb41a218..b83f3d175a08 100644
--- a/java-spanner/google-cloud-spanner/src/test/java/com/google/cloud/spanner/BuiltInOpenTelemetryMetricsProviderTest.java
+++ b/java-spanner/google-cloud-spanner/src/test/java/com/google/cloud/spanner/BuiltInOpenTelemetryMetricsProviderTest.java
@@ -110,6 +110,7 @@ private void verifyHash(String hash) {
 
   private SpannerOptions newTestOptions() {
     return SpannerOptions.newBuilder()
+        .setEmulatorHost(null)
         .setProjectId("host-project")
         .setCredentials(
             OAuth2Credentials.create(new AccessToken("test-token", new Date(Long.MAX_VALUE))))
diff --git a/java-spanner/google-cloud-spanner/src/test/java/com/google/cloud/spanner/LocationAwareSharedBackendReplicaHarnessTest.java b/java-spanner/google-cloud-spanner/src/test/java/com/google/cloud/spanner/LocationAwareSharedBackendReplicaHarnessTest.java
index d55e95653e21..21f0b144f98d 100644
--- a/java-spanner/google-cloud-spanner/src/test/java/com/google/cloud/spanner/LocationAwareSharedBackendReplicaHarnessTest.java
+++ b/java-spanner/google-cloud-spanner/src/test/java/com/google/cloud/spanner/LocationAwareSharedBackendReplicaHarnessTest.java
@@ -605,7 +605,7 @@ private static int waitForReplicaRoutedRead(
   private static void waitForReplicaRoutedStrongRead(
       DatabaseClient client, SharedBackendReplicaHarness harness, int expectedReplicaIndex)
       throws InterruptedException {
-    long deadlineNanos = System.nanoTime() + TimeUnit.SECONDS.toNanos(10);
+    long deadlineNanos = System.nanoTime() + TimeUnit.SECONDS.toNanos(30);
     while (System.nanoTime() < deadlineNanos) {
       harness.clearRequests();
       boolean sawRow;
diff --git a/java-spanner/samples/snippets/src/test/java/com/example/spanner/CreateFullBackupScheduleSampleIT.java b/java-spanner/samples/snippets/src/test/java/com/example/spanner/CreateFullBackupScheduleSampleIT.java
index 82b67c4dfe85..f1a5d2695d13 100644
--- a/java-spanner/samples/snippets/src/test/java/com/example/spanner/CreateFullBackupScheduleSampleIT.java
+++ b/java-spanner/samples/snippets/src/test/java/com/example/spanner/CreateFullBackupScheduleSampleIT.java
@@ -20,6 +20,7 @@
 
 import com.google.spanner.admin.database.v1.BackupScheduleName;
 import java.util.UUID;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -29,6 +30,11 @@ public class CreateFullBackupScheduleSampleIT extends SampleTestBaseV2 {
   // Default instance and given db should exist for tests to pass.
   private static String databaseId = System.getProperty("spanner.sample.database", "mysample");
 
+  @Before
+  public void cleanUpPreExistingBackupSchedules() {
+    cleanUpPreExistingBackupSchedules(instanceId, databaseId);
+  }
+
   @Test
   public void testCreateFullBackupScheduleSample() throws Exception {
     String backupScheduleId = String.format("schedule-%s", UUID.randomUUID());
diff --git a/java-spanner/samples/snippets/src/test/java/com/example/spanner/CreateIncrementalBackupScheduleSampleIT.java b/java-spanner/samples/snippets/src/test/java/com/example/spanner/CreateIncrementalBackupScheduleSampleIT.java
index ac38150f5203..3b64c787f185 100644
--- a/java-spanner/samples/snippets/src/test/java/com/example/spanner/CreateIncrementalBackupScheduleSampleIT.java
+++ b/java-spanner/samples/snippets/src/test/java/com/example/spanner/CreateIncrementalBackupScheduleSampleIT.java
@@ -20,6 +20,7 @@
 
 import com.google.spanner.admin.database.v1.BackupScheduleName;
 import java.util.UUID;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -29,6 +30,11 @@ public class CreateIncrementalBackupScheduleSampleIT extends SampleTestBaseV2 {
   // Default instance and given db should exist for tests to pass.
   private static String databaseId = System.getProperty("spanner.sample.database", "mysample");
 
+  @Before
+  public void cleanUpPreExistingBackupSchedules() {
+    cleanUpPreExistingBackupSchedules(multiRegionalInstanceId, databaseId);
+  }
+
   @Test
   public void testCreateIncrementalBackupScheduleSample() throws Exception {
     String backupScheduleId = String.format("schedule-%s", UUID.randomUUID());
diff --git a/java-spanner/samples/snippets/src/test/java/com/example/spanner/DeleteBackupScheduleSampleIT.java b/java-spanner/samples/snippets/src/test/java/com/example/spanner/DeleteBackupScheduleSampleIT.java
index f379c9bfe47d..2669f93f44be 100644
--- a/java-spanner/samples/snippets/src/test/java/com/example/spanner/DeleteBackupScheduleSampleIT.java
+++ b/java-spanner/samples/snippets/src/test/java/com/example/spanner/DeleteBackupScheduleSampleIT.java
@@ -20,6 +20,7 @@
 
 import com.google.spanner.admin.database.v1.BackupScheduleName;
 import java.util.UUID;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -29,6 +30,11 @@ public class DeleteBackupScheduleSampleIT extends SampleTestBaseV2 {
   // Default instance and given db should exist for tests to pass.
   private static String databaseId = System.getProperty("spanner.sample.database", "mysample");
 
+  @Before
+  public void cleanUpPreExistingBackupSchedules() {
+    cleanUpPreExistingBackupSchedules(instanceId, databaseId);
+  }
+
   @Test
   public void testDeleteBackupScheduleSample() throws Exception {
     String backupScheduleId = String.format("schedule-%s", UUID.randomUUID());
diff --git a/java-spanner/samples/snippets/src/test/java/com/example/spanner/GetBackupScheduleSampleIT.java b/java-spanner/samples/snippets/src/test/java/com/example/spanner/GetBackupScheduleSampleIT.java
index 366093cddd5e..50e5be4065cb 100644
--- a/java-spanner/samples/snippets/src/test/java/com/example/spanner/GetBackupScheduleSampleIT.java
+++ b/java-spanner/samples/snippets/src/test/java/com/example/spanner/GetBackupScheduleSampleIT.java
@@ -20,6 +20,7 @@
 
 import com.google.spanner.admin.database.v1.BackupScheduleName;
 import java.util.UUID;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -29,6 +30,11 @@ public class GetBackupScheduleSampleIT extends SampleTestBaseV2 {
   // Default instance and given db should exist for tests to pass.
   private static String databaseId = System.getProperty("spanner.sample.database", "mysample");
 
+  @Before
+  public void cleanUpPreExistingBackupSchedules() {
+    cleanUpPreExistingBackupSchedules(instanceId, databaseId);
+  }
+
   @Test
   public void testGetBackupScheduleSample() throws Exception {
     String backupScheduleId = String.format("schedule-%s", UUID.randomUUID());
diff --git a/java-spanner/samples/snippets/src/test/java/com/example/spanner/ListBackupSchedulesSampleIT.java b/java-spanner/samples/snippets/src/test/java/com/example/spanner/ListBackupSchedulesSampleIT.java
index 97feb2d7e9ba..e2cb29943473 100644
--- a/java-spanner/samples/snippets/src/test/java/com/example/spanner/ListBackupSchedulesSampleIT.java
+++ b/java-spanner/samples/snippets/src/test/java/com/example/spanner/ListBackupSchedulesSampleIT.java
@@ -20,6 +20,7 @@
 
 import com.google.spanner.admin.database.v1.BackupScheduleName;
 import java.util.UUID;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -29,6 +30,11 @@ public class ListBackupSchedulesSampleIT extends SampleTestBaseV2 {
   // Default instance and given db should exist for tests to pass.
   private static String databaseId = System.getProperty("spanner.sample.database", "mysample");
 
+  @Before
+  public void cleanUpPreExistingBackupSchedules() {
+    cleanUpPreExistingBackupSchedules(instanceId, databaseId);
+  }
+
   @Test
   public void testListBackupSchedulesSample() throws Exception {
     String backupScheduleId1 = String.format("schedule-%s", UUID.randomUUID());
diff --git a/java-spanner/samples/snippets/src/test/java/com/example/spanner/SampleTestBaseV2.java b/java-spanner/samples/snippets/src/test/java/com/example/spanner/SampleTestBaseV2.java
index 5a43261269d9..17098729187a 100644
--- a/java-spanner/samples/snippets/src/test/java/com/example/spanner/SampleTestBaseV2.java
+++ b/java-spanner/samples/snippets/src/test/java/com/example/spanner/SampleTestBaseV2.java
@@ -23,6 +23,7 @@
 import com.google.cloud.spanner.admin.database.v1.DatabaseAdminSettings;
 import com.google.cloud.spanner.admin.instance.v1.InstanceAdminClient;
 import com.google.cloud.spanner.admin.instance.v1.InstanceAdminSettings;
+import com.google.spanner.admin.database.v1.BackupSchedule;
 import com.google.spanner.admin.database.v1.DatabaseDialect;
 import java.io.IOException;
 import java.util.concurrent.TimeUnit;
@@ -180,4 +181,26 @@ static String getCreateDatabaseStatement(
       return "CREATE DATABASE \"" + databaseName + "\"";
     }
   }
+
+  protected static void cleanUpPreExistingBackupSchedules(
+      final String targetInstanceId, final String targetDatabaseId) {
+    try {
+      if (targetInstanceId == null || targetDatabaseId == null || databaseAdminClient == null) {
+        return;
+      }
+      DatabaseAdminClient dbAdminClient = databaseAdminClient;
+      for (BackupSchedule schedule :
+          dbAdminClient
+              .listBackupSchedules(getDatabaseName(projectId, targetInstanceId, targetDatabaseId))
+              .iterateAll()) {
+        try {
+          dbAdminClient.deleteBackupSchedule(schedule.getName());
+        } catch (Exception ignored) {
+          // Ignore errors if schedule was already deleted or is in use
+        }
+      }
+    } catch (Exception e) {
+      System.err.println("Warning: failed pre-test schedule cleanup: " + e.getMessage());
+    }
+  }
 }
diff --git a/java-spanner/samples/snippets/src/test/java/com/example/spanner/UpdateBackupScheduleSampleIT.java b/java-spanner/samples/snippets/src/test/java/com/example/spanner/UpdateBackupScheduleSampleIT.java
index eff037459f91..a952ef1cbc03 100644
--- a/java-spanner/samples/snippets/src/test/java/com/example/spanner/UpdateBackupScheduleSampleIT.java
+++ b/java-spanner/samples/snippets/src/test/java/com/example/spanner/UpdateBackupScheduleSampleIT.java
@@ -20,6 +20,7 @@
 
 import com.google.spanner.admin.database.v1.BackupScheduleName;
 import java.util.UUID;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -29,6 +30,11 @@ public class UpdateBackupScheduleSampleIT extends SampleTestBaseV2 {
   // Default instance and given db should exist for tests to pass.
   private static String databaseId = System.getProperty("spanner.sample.database", "mysample");
 
+  @Before
+  public void cleanUpPreExistingBackupSchedules() {
+    cleanUpPreExistingBackupSchedules(instanceId, databaseId);
+  }
+
   @Test
   public void testUpdateBackupScheduleSample() throws Exception {
     String backupScheduleId = String.format("schedule-%s", UUID.randomUUID());