From 24e003095a4654da13c8cfe5e84d29ab46fe16b8 Mon Sep 17 00:00:00 2001
From: Rahul Yadav <rahulyadavsep92@gmail.com>
Date: Thu, 18 Jun 2026 14:31:36 +0530
Subject: [PATCH] test(spanner): deflake R/W transaction test with in-memory
 harness test for omni

---
 .../LocationAwareSharedBackendReplicaHarnessTest.java       | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

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 84643ad21207..dbb1aecb052e 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
@@ -398,7 +398,11 @@ public void readWriteTransactionAbortedCommitUsesReadAffinityReplicaForBypassTra
               });
 
       assertEquals(2, attempts.get());
-      assertEquals(1, firstReplicaIndex.get());
+      assertNotEquals(
+          "Expected read-write transaction read to route to a bypass replica.\n"
+              + routingDiagnostics(harness),
+          -1,
+          firstReplicaIndex.get());
       int secondReplicaIndex = 1 - firstReplicaIndex.get();
       assertEquals(
           2,