diff --git a/tests/BackgroundDexOptServiceIntegrationTests/src/com/android/server/pm/BackgroundDexOptServiceIntegrationTests.java b/tests/BackgroundDexOptServiceIntegrationTests/src/com/android/server/pm/BackgroundDexOptServiceIntegrationTests.java
index 90ddb6ffb34ab..d2a6bf288be43 100644
--- a/tests/BackgroundDexOptServiceIntegrationTests/src/com/android/server/pm/BackgroundDexOptServiceIntegrationTests.java
+++ b/tests/BackgroundDexOptServiceIntegrationTests/src/com/android/server/pm/BackgroundDexOptServiceIntegrationTests.java
@@ -31,6 +31,7 @@ import org.junit.After;
 import org.junit.Assert;
 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;
@@ -299,6 +300,8 @@ public final class BackgroundDexOptServiceIntegrationTests {
 
     // Test that background dexopt under low storage conditions downgrades unused packages.
     @Test
+    @Ignore("b/251438180: This test has been failing for a long time; temporarily disable it while"
+            + " we investigate this issue.")
     public void testBackgroundDexOptDowngradeSuccessful() throws IOException {
         // Should be more than DOWNGRADE_AFTER_DAYS.
         long deltaDays = DOWNGRADE_AFTER_DAYS + 1;