diff --git a/spring-session-data-geode/src/test/java/org/springframework/session/data/gemfire/AbstractGemFireOperationsSessionRepositoryTests.java b/spring-session-data-geode/src/test/java/org/springframework/session/data/gemfire/AbstractGemFireOperationsSessionRepositoryTests.java
index 7109238..e9c0c5a 100644
--- a/spring-session-data-geode/src/test/java/org/springframework/session/data/gemfire/AbstractGemFireOperationsSessionRepositoryTests.java
+++ b/spring-session-data-geode/src/test/java/org/springframework/session/data/gemfire/AbstractGemFireOperationsSessionRepositoryTests.java
@@ -194,7 +194,7 @@ public class AbstractGemFireOperationsSessionRepositoryTests {
 			new TestGemFireOperationsSessionRepository(null);
 		}
 		catch (IllegalArgumentException expected) {
-			assertThat(expected).hasMessage("GemfireOperations must not be null");
+			assertThat(expected).hasMessage("GemfireOperations is required");
 			assertThat(expected).hasNoCause();
 
 			throw expected;