diff --git a/spring-ai-core/src/test/java/org/springframework/ai/embedding/EmbeddingUtilTests.java b/spring-ai-core/src/test/java/org/springframework/ai/embedding/EmbeddingUtilTests.java
index bfd52b167..45d1e68c4 100644
--- a/spring-ai-core/src/test/java/org/springframework/ai/embedding/EmbeddingUtilTests.java
+++ b/spring-ai-core/src/test/java/org/springframework/ai/embedding/EmbeddingUtilTests.java
@@ -83,7 +83,7 @@ public class EmbeddingUtilTests {
 
 	@Test
 	public void testUnknownModelDimension() {
-		when(embeddingClient.embed(eq("Test String"))).thenReturn(List.of(0.1, 0.1, 0.1));
+		when(embeddingClient.embed(eq("Hello world!"))).thenReturn(List.of(0.1, 0.1, 0.1));
 		assertThat(EmbeddingUtil.dimensions(embeddingClient, "unknown_model", "Hello world!")).isEqualTo(3);
 	}