diff --git a/src/test/java/org/elasticsearch/index/analysis/AnalysisModuleTests.java b/src/test/java/org/elasticsearch/index/analysis/AnalysisModuleTests.java
index 886c3b289a6..c1d260392ff 100644
--- a/src/test/java/org/elasticsearch/index/analysis/AnalysisModuleTests.java
+++ b/src/test/java/org/elasticsearch/index/analysis/AnalysisModuleTests.java
@@ -251,7 +251,7 @@ public class AnalysisModuleTests extends ElasticsearchTestCase {
             fail("This should fail with IllegalArgumentException because the analyzers name starts with _");
         } catch (ProvisionException e) {
             assertTrue(e.getCause() instanceof IllegalArgumentException);
-            assertThat(e.getCause().getMessage(), equalTo("analyzer name must not start with _. got \"_invalid_name\""));
+            assertThat(e.getCause().getMessage(), equalTo("analyzer name must not start with '_'. got \"_invalid_name\""));
         }
     }
 
@@ -268,7 +268,7 @@ public class AnalysisModuleTests extends ElasticsearchTestCase {
             fail("This should fail with IllegalArgumentException because the analyzers alias starts with _");
         } catch (ProvisionException e) {
             assertTrue(e.getCause() instanceof IllegalArgumentException);
-            assertThat(e.getCause().getMessage(), equalTo("analyzer name must not start with _. got \"_invalid_name\""));
+            assertThat(e.getCause().getMessage(), equalTo("analyzer name must not start with '_'. got \"_invalid_name\""));
         }
     }
 }