diff --git a/plugin/src/test/java/org/opensearch/ml/rest/RestMLRemoteInferenceIT.java b/plugin/src/test/java/org/opensearch/ml/rest/RestMLRemoteInferenceIT.java
index 7f691e5c0b..09e7a0c804 100644
--- a/plugin/src/test/java/org/opensearch/ml/rest/RestMLRemoteInferenceIT.java
+++ b/plugin/src/test/java/org/opensearch/ml/rest/RestMLRemoteInferenceIT.java
@@ -600,14 +600,6 @@ public void testOpenAITextEmbeddingModel_UTF8() throws IOException, InterruptedE
         }, null);
     }
 
-    public void testOpenAITextEmbeddingModel_ISO8859_1() throws IOException, InterruptedException {
-        testOpenAITextEmbeddingModel("ISO-8859-1", null, (exception) -> {
-            assertTrue(exception instanceof org.opensearch.client.ResponseException);
-            String stackTrace = ExceptionUtils.getStackTrace(exception);
-            assertTrue(stackTrace.contains("'utf-8' codec can't decode byte 0xeb"));
-        });
-    }
-
     private void testOpenAITextEmbeddingModel(String charset, Consumer<Map> verifyResponse, Consumer<Exception> verifyException)
         throws IOException,
         InterruptedException {