diff --git a/test/hotspot/jtreg/compiler/jsr292/ContinuousCallSiteTargetChange.java b/test/hotspot/jtreg/compiler/jsr292/ContinuousCallSiteTargetChange.java
index e77df166da1e0..e8e6551e453a1 100644
--- a/test/hotspot/jtreg/compiler/jsr292/ContinuousCallSiteTargetChange.java
+++ b/test/hotspot/jtreg/compiler/jsr292/ContinuousCallSiteTargetChange.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2023, 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
@@ -28,7 +28,7 @@
  *
  * @build jdk.test.whitebox.WhiteBox
  * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
- * @run driver compiler.jsr292.ContinuousCallSiteTargetChange
+ * @run driver/timeout=180 compiler.jsr292.ContinuousCallSiteTargetChange
  */
 
 package compiler.jsr292;
diff --git a/test/hotspot/jtreg/vmTestbase/nsk/monitoring/stress/classload/load007/TestDescription.java b/test/hotspot/jtreg/vmTestbase/nsk/monitoring/stress/classload/load007/TestDescription.java
index 5080c8cb2233b..93bfe9f2c276a 100644
--- a/test/hotspot/jtreg/vmTestbase/nsk/monitoring/stress/classload/load007/TestDescription.java
+++ b/test/hotspot/jtreg/vmTestbase/nsk/monitoring/stress/classload/load007/TestDescription.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2023, 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
@@ -47,7 +47,7 @@
  *          /test/lib
  * @comment generate and compile LoadableClassXXX classes
  * @run driver nsk.monitoring.stress.classload.GenClassesBuilder
- * @run main/othervm
+ * @run main/othervm/timeout=180
  *      -XX:-UseGCOverheadLimit
  *      nsk.monitoring.stress.classload.load001
  *      classes
diff --git a/test/hotspot/jtreg/vmTestbase/nsk/monitoring/stress/classload/load011/TestDescription.java b/test/hotspot/jtreg/vmTestbase/nsk/monitoring/stress/classload/load011/TestDescription.java
index 6b188c7e99fef..97615b682906f 100644
--- a/test/hotspot/jtreg/vmTestbase/nsk/monitoring/stress/classload/load011/TestDescription.java
+++ b/test/hotspot/jtreg/vmTestbase/nsk/monitoring/stress/classload/load011/TestDescription.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2023, 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
@@ -45,7 +45,7 @@
  *          /test/lib
  * @comment generate and compile LoadableClassXXX classes
  * @run driver nsk.monitoring.stress.classload.GenClassesBuilder
- * @run main/othervm
+ * @run main/othervm/timeout=180
  *      -XX:-UseGCOverheadLimit
  *      nsk.monitoring.stress.classload.load001
  *      classes
diff --git a/test/hotspot/jtreg/vmTestbase/nsk/monitoring/stress/classload/load012/TestDescription.java b/test/hotspot/jtreg/vmTestbase/nsk/monitoring/stress/classload/load012/TestDescription.java
index 4f314677adb18..e56cfe387e21e 100644
--- a/test/hotspot/jtreg/vmTestbase/nsk/monitoring/stress/classload/load012/TestDescription.java
+++ b/test/hotspot/jtreg/vmTestbase/nsk/monitoring/stress/classload/load012/TestDescription.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2023, 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
@@ -45,7 +45,7 @@
  *          /test/lib
  * @comment generate and compile LoadableClassXXX classes
  * @run driver nsk.monitoring.stress.classload.GenClassesBuilder
- * @run main/othervm
+ * @run main/othervm/timeout=180
  *      -XX:-UseGCOverheadLimit
  *      nsk.monitoring.stress.classload.load001
  *      classes
diff --git a/test/jdk/java/lang/instrument/GetObjectSizeIntrinsicsTest.java b/test/jdk/java/lang/instrument/GetObjectSizeIntrinsicsTest.java
index c80e330461303..fc3b1a66d2a5a 100644
--- a/test/jdk/java/lang/instrument/GetObjectSizeIntrinsicsTest.java
+++ b/test/jdk/java/lang/instrument/GetObjectSizeIntrinsicsTest.java
@@ -278,7 +278,7 @@
  *
  * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
  *
- * @run main/othervm/timeout=240 -Xmx8g
+ * @run main/othervm/timeout=300 -Xmx8g
  *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
  *                   -Xint
  *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest large