diff --git a/java-spanner/google-cloud-spanner/src/test/java/com/google/cloud/spanner/MultiplexedSessionDatabaseClientMockServerTest.java b/java-spanner/google-cloud-spanner/src/test/java/com/google/cloud/spanner/MultiplexedSessionDatabaseClientMockServerTest.java
index 33f64aa636c4..2682e821e276 100644
--- a/java-spanner/google-cloud-spanner/src/test/java/com/google/cloud/spanner/MultiplexedSessionDatabaseClientMockServerTest.java
+++ b/java-spanner/google-cloud-spanner/src/test/java/com/google/cloud/spanner/MultiplexedSessionDatabaseClientMockServerTest.java
@@ -59,6 +59,7 @@
 import java.util.stream.Collectors;
 import org.junit.Before;
 import org.junit.BeforeClass;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -101,6 +102,7 @@ public void createSpannerInstance() {
             .getService();
   }
 
+  @Ignore("Flaky test: b/579436726")
   @Test
   public void testCreateSessionDeadlineExceededWithNoSessionCreateWaitTime() throws Exception {
     // Simulate a problem with the CreateSession RPC making it slow.