diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverInterface.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverInterface.java
index c8aa3ab972f..be56c96e260 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverInterface.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverInterface.java
@@ -242,6 +242,7 @@ public class TestRegionObserverInterface {
     TableName tableName =
         TableName.valueOf("testHBase3583");
     util.createTable(tableName, new byte[][] {A, B, C});
+    util.waitUntilAllRegionsAssigned(tableName);
 
     verifyMethodResult(SimpleRegionObserver.class,
         new String[] {"hadPreGet", "hadPostGet", "wasScannerNextCalled",