1 files changed, 8 insertions, 0 deletions
diff --git a/test/021-string2/src/Main.java b/test/021-string2/src/Main.java
index 141a08983b..39595f3280 100644
--- a/test/021-string2/src/Main.java
+++ b/test/021-string2/src/Main.java
@@ -118,6 +118,7 @@ public class Main {
 
         testEqualsConstString();
         testConstStringEquals();
+        testStringConcat();
 
         // Regression tests for String.setCharAt() breaking string compression invariants.
         Locale en_US = new Locale("en", "US");
@@ -752,6 +753,13 @@ public class Main {
         Assert.assertTrue("A".equals(new String(new byte[] { (byte)'A' }, /* hibyte */ 0x100)));
     }
 
+    public static void testStringConcat() {
+        Assert.assertEquals("abcxyzw", "abc".concat("xyzw"));
+        Assert.assertEquals("abc\u0440", "abc".concat("\u0440"));
+        Assert.assertEquals("\u0440xyzw", "\u0440".concat("xyzw"));
+        Assert.assertEquals("abc\u0440xyzw\u0440", "abc\u0440".concat("xyzw\u0440"));
+    }
+
     public static boolean $noinline$equalsConstString0(String s) {
         return s.equals("");
     }