diff --git a/core/src/test/java/org/opensearch/sql/analysis/AnalyzerTest.java b/core/src/test/java/org/opensearch/sql/analysis/AnalyzerTest.java
index 47ea2e5c5d3..0d4973e36a4 100644
--- a/core/src/test/java/org/opensearch/sql/analysis/AnalyzerTest.java
+++ b/core/src/test/java/org/opensearch/sql/analysis/AnalyzerTest.java
@@ -1941,6 +1941,6 @@ public void regex_command_throws_unsupported_exception_with_legacy_engine() {
                             field("lastname"), false, stringLiteral("^[A-Z][a-z]+$"))
                         .attach(relation("schema"))));
     assertEquals(
-        "REGEX is supported only when plugins.calcite.enabled=true", exception.getMessage());
+        "Regex is supported only when plugins.calcite.enabled=true", exception.getMessage());
   }
 }