diff --git a/src/test/java/org/opensearch/commons/rest/TrustStoreTest.java b/src/test/java/org/opensearch/commons/rest/TrustStoreTest.java
index 108a9e8d..271b1892 100644
--- a/src/test/java/org/opensearch/commons/rest/TrustStoreTest.java
+++ b/src/test/java/org/opensearch/commons/rest/TrustStoreTest.java
@@ -20,7 +20,7 @@ public class TrustStoreTest {
     public void testCreate() throws Exception {
         String resourceName = "sample.pem";
         String absolutePath = new File(getClass().getClassLoader().getResource(resourceName).getFile()).getAbsolutePath();
-        assertTrue(absolutePath.endsWith("/sample.pem"));
+        assertTrue(absolutePath.endsWith(File.separator + "sample.pem"));
 
         KeyStore store = new TrustStore(absolutePath).create();
         assertNotNull(store);