diff --git a/test/jdk/jdk/jfr/jvm/TestModularImage.java b/test/jdk/jdk/jfr/jvm/TestModularImage.java
index 0f10150af60..7a019365178 100644
--- a/test/jdk/jdk/jfr/jvm/TestModularImage.java
+++ b/test/jdk/jdk/jfr/jvm/TestModularImage.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -43,7 +43,12 @@ import jdk.test.lib.process.ProcessTools;
  *          as expected
  * @requires vm.hasJFR
  * @library /test/lib
- * @run driver jdk.jfr.jvm.TestModularImage
+ * @comment Test is being run in othervm to support JEP 493 enabled
+ *          JDKs which don't allow patched modules. Note that jtreg patches
+ *          module java.base to add java.lang.JTRegModuleHelper. If then a
+ *          jlink run is attempted in-process - using the ToolProvider API -
+ *          on a JEP 493 enabled JDK, the test fails.
+ * @run main/othervm jdk.jfr.jvm.TestModularImage
  */
 public class TestModularImage {
     private static final String STARTED_RECORDING = "Started recording";
diff --git a/test/jdk/tools/launcher/SourceMode.java b/test/jdk/tools/launcher/SourceMode.java
index 20e88228563..23f0b12e9b4 100644
--- a/test/jdk/tools/launcher/SourceMode.java
+++ b/test/jdk/tools/launcher/SourceMode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,7 +26,12 @@
  * @bug 8192920 8204588 8210275 8286571
  * @summary Test source mode
  * @modules jdk.compiler jdk.jlink
- * @run main SourceMode
+ * @comment Test is being run in othervm to support JEP 493 enabled
+ *          JDKs which don't allow patched modules. Note that jtreg patches
+ *          module java.base to add java.lang.JTRegModuleHelper. If then a
+ *          jlink run is attempted in-process - using the ToolProvider API -
+ *          on a JEP 493 enabled JDK, the test fails.
+ * @run main/othervm SourceMode
  */