diff --git a/test/hotspot/jtreg/compiler/c2/Test7046096.java b/test/hotspot/jtreg/compiler/c2/Test7046096.java
index 46eb935e2d0..fb73bba4373 100644
--- a/test/hotspot/jtreg/compiler/c2/Test7046096.java
+++ b/test/hotspot/jtreg/compiler/c2/Test7046096.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 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
@@ -30,6 +30,18 @@
  *    compiler.c2.Test7046096
  */
 
+
+/*
+ * @test id=stringConcatInline
+ * @bug 7046096 8357822
+ * @summary The same test with an updated compile directive that produces
+ *          StringBuilder-backed string concatenations.
+ *
+ * @compile -XDstringConcat=inline Test7046096.java
+ * @run main/othervm -Xbatch compiler.c2.Test7046096
+ */
+
+
 package compiler.c2;
 
 public class Test7046096 {
diff --git a/test/hotspot/jtreg/compiler/c2/Test7179138_2.java b/test/hotspot/jtreg/compiler/c2/Test7179138_2.java
index 4e89f6aced0..5f96ea942ef 100644
--- a/test/hotspot/jtreg/compiler/c2/Test7179138_2.java
+++ b/test/hotspot/jtreg/compiler/c2/Test7179138_2.java
@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2012 Skip Balk.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -32,6 +33,18 @@
  * @author Skip Balk
  */
 
+
+/*
+ * @test id=stringConcatInline
+ * @bug 7179138
+ * @summary The same test with an updated compile directive that produces
+ *          StringBuilder-backed string concatenations.
+ *
+ * @compile -XDstringConcat=inline Test7179138_2.java
+ * @run main/othervm -Xbatch -XX:-TieredCompilation compiler.c2.Test7179138_2
+ */
+
+
 package compiler.c2;
 
 public class Test7179138_2 {
diff --git a/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Implicit01/cs_disabled/TestDescription.java b/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Implicit01/cs_disabled/TestDescription.java
index 2eddeafa2c9..13bc3b4d640 100644
--- a/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Implicit01/cs_disabled/TestDescription.java
+++ b/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Implicit01/cs_disabled/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
@@ -33,3 +33,17 @@
  * @run main/othervm -XX:-CompactStrings vm.compiler.optimizations.stringconcat.implicit.Implicit01
  */
 
+
+/*
+ * @test id=stringConcatInline
+ *
+ * @summary The same test with an updated compile directive that produces
+ *          StringBuilder-backed string concatenations.
+ * VM Testbase keywords: [jit, quick]
+ *
+ * @library /vmTestbase
+ *          /test/lib
+ * @compile -XDstringConcat=inline ../../Implicit01.java
+ * @run main/othervm -XX:-CompactStrings vm.compiler.optimizations.stringconcat.implicit.Implicit01
+ */
+
diff --git a/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Implicit01/cs_enabled/TestDescription.java b/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Implicit01/cs_enabled/TestDescription.java
index 7e7295f5108..87e8bdcbcc7 100644
--- a/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Implicit01/cs_enabled/TestDescription.java
+++ b/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Implicit01/cs_enabled/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
@@ -33,3 +33,17 @@
  * @run main/othervm -XX:+CompactStrings vm.compiler.optimizations.stringconcat.implicit.Implicit01
  */
 
+
+/*
+ * @test id=stringConcatInline
+ *
+ * @summary The same test with an updated compile directive that produces
+ *          StringBuilder-backed string concatenations.
+ * VM Testbase keywords: [jit, quick]
+ *
+ * @library /vmTestbase
+ *          /test/lib
+ * @compile -XDstringConcat=inline ../../Implicit01.java
+ * @run main/othervm -XX:+CompactStrings vm.compiler.optimizations.stringconcat.implicit.Implicit01
+ */
+
diff --git a/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Merge01/cs_disabled/TestDescription.java b/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Merge01/cs_disabled/TestDescription.java
index c56a554b1da..cbbe4d97ee4 100644
--- a/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Merge01/cs_disabled/TestDescription.java
+++ b/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Merge01/cs_disabled/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
@@ -33,3 +33,17 @@
  * @run main/othervm -XX:-CompactStrings vm.compiler.optimizations.stringconcat.implicit.Merge01
  */
 
+
+/*
+ * @test id=stringConcatInline
+ *
+ * @summary The same test with an updated compile directive that produces
+ *          StringBuilder-backed string concatenations.
+ * VM Testbase keywords: [jit, quick]
+ *
+ * @library /vmTestbase
+ *          /test/lib
+ * @compile -XDstringConcat=inline ../../Merge01.java
+ * @run main/othervm -XX:-CompactStrings vm.compiler.optimizations.stringconcat.implicit.Merge01
+ */
+
diff --git a/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Merge01/cs_enabled/TestDescription.java b/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Merge01/cs_enabled/TestDescription.java
index 3c082fefd25..c6fc8d67de6 100644
--- a/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Merge01/cs_enabled/TestDescription.java
+++ b/test/hotspot/jtreg/vmTestbase/vm/compiler/optimizations/stringconcat/implicit/Merge01/cs_enabled/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
@@ -33,3 +33,17 @@
  * @run main/othervm -XX:+CompactStrings vm.compiler.optimizations.stringconcat.implicit.Merge01
  */
 
+
+/*
+ * @test id=stringConcatInline
+ *
+ * @summary The same test with an updated compile directive that produces
+ *          StringBuilder-backed string concatenations.
+ * VM Testbase keywords: [jit, quick]
+ *
+ * @library /vmTestbase
+ *          /test/lib
+ * @compile -XDstringConcat=inline ../../Merge01.java
+ * @run main/othervm -XX:+CompactStrings vm.compiler.optimizations.stringconcat.implicit.Merge01
+ */
+