diff --git a/src/test/kotlin/org/opensearch/indexmanagement/rollup/RollupRestTestCase.kt b/src/test/kotlin/org/opensearch/indexmanagement/rollup/RollupRestTestCase.kt
index 25d2c47ee..47a7c67fe 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/rollup/RollupRestTestCase.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/rollup/RollupRestTestCase.kt
@@ -276,7 +276,7 @@ abstract class RollupRestTestCase : IndexManagementRestTestCase() {
         val res =
             client().makeRequest(
                 "PUT", "_cluster/settings", emptyMap(),
-                StringEntity(request, ContentType.APPLICATION_JSON),
+                StringEntity(request, APPLICATION_JSON),
             )
         assertEquals("Request failed", RestStatus.OK, res.restStatus())
     }