diff --git a/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Compact_InternedStrings/TestDescription.java b/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Compact_InternedStrings/TestDescription.java
index 8d28df3c457..657cb68edc7 100644
--- a/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Compact_InternedStrings/TestDescription.java
+++ b/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Compact_InternedStrings/TestDescription.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2020, 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
@@ -34,9 +34,11 @@
  * This testcase uses interned strings for both first and second phases
  * and multiple threads.
  *
+ * @requires os.maxMemory > 3G
  * @library /vmTestbase
  *          /test/lib
  * @run main/othervm
+ *      -Xmx2G
  *      -XX:-UseGCOverheadLimit
  *      vm.gc.compact.Compact
  *      -gp interned(randomString)
diff --git a/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Compact_InternedStrings_NonbranchyTree/TestDescription.java b/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Compact_InternedStrings_NonbranchyTree/TestDescription.java
index 1aaeb2fc84d..b0771871a56 100644
--- a/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Compact_InternedStrings_NonbranchyTree/TestDescription.java
+++ b/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Compact_InternedStrings_NonbranchyTree/TestDescription.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2020, 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
@@ -34,9 +34,11 @@
  * This testcase uses interned strings for first phase,
  * random arrays for second phases and multiple threads.
  *
+ * @requires os.maxMemory > 3G
  * @library /vmTestbase
  *          /test/lib
  * @run main/othervm
+ *      -Xmx2G
  *      -XX:-UseGCOverheadLimit
  *      vm.gc.compact.Compact
  *      -gp interned(randomString)
diff --git a/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Compact_Strings_ArrayOf/TestDescription.java b/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Compact_Strings_ArrayOf/TestDescription.java
index f54f006d4aa..ea942c7be07 100644
--- a/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Compact_Strings_ArrayOf/TestDescription.java
+++ b/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Compact_Strings_ArrayOf/TestDescription.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2020, 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
@@ -34,9 +34,11 @@
  * This testcase uses random strings for first phase, array of
  * random strings for second phase and multiple threads.
  *
+ * @requires os.maxMemory > 3G
  * @library /vmTestbase
  *          /test/lib
  * @run main/othervm
+ *      -Xmx2G
  *      -XX:-UseGCOverheadLimit
  *      vm.gc.compact.Compact
  *      -gp randomString
diff --git a/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Humongous_InternedStrings/TestDescription.java b/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Humongous_InternedStrings/TestDescription.java
index b155c081eea..41c2b0ae4d0 100644
--- a/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Humongous_InternedStrings/TestDescription.java
+++ b/test/hotspot/jtreg/vmTestbase/vm/gc/compact/Humongous_InternedStrings/TestDescription.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2020, 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
@@ -34,9 +34,11 @@
  * This testcase uses interned strings for both first and second phases
  * and multiple threads.
  *
+ * @requires os.maxMemory > 3G
  * @library /vmTestbase
  *          /test/lib
  * @run main/othervm
+ *      -Xmx2G
  *      -XX:-UseGCOverheadLimit
  *      vm.gc.compact.Compact
  *      -gp interned(randomString)