diff --git a/unicodetools/data/idna/dev/IdnaTestV2.txt b/unicodetools/data/idna/dev/IdnaTestV2.txt
index abcc8277a..fb583ae4d 100644
--- a/unicodetools/data/idna/dev/IdnaTestV2.txt
+++ b/unicodetools/data/idna/dev/IdnaTestV2.txt
@@ -1,5 +1,5 @@
 # IdnaTestV2.txt
-# Date: 2024-05-22, 02:31:53 GMT
+# Date: 2024-05-22, 22:45:49 GMT
 # © 2024 Unicode®, Inc.
 # Unicode and the Unicode Logo are registered trademarks of Unicode, Inc. in the U.S. and other countries.
 # For terms of use and license, see https://www.unicode.org/terms_of_use.html
@@ -554,6 +554,11 @@ xn--ASCII-; ascii; [P4]; ; ; ;  # ascii
 ascii; ; ; ; ; ;  # ascii
 xn--unicode-.org; unicode.org; [P4]; ; ; ;  # unicode.org
 unicode.org; ; ; ; ; ;  # unicode.org
+陋㛼当𤎫竮䗗; 陋㛼当𤎫竮䗗; ; xn--snl253bgitxhzwu2arn60c; ; ;  # 陋㛼当𤎫竮䗗
+陋㛼当𤎫竮䗗; ; ; xn--snl253bgitxhzwu2arn60c; ; ;  # 陋㛼当𤎫竮䗗
+xn--snl253bgitxhzwu2arn60c; 陋㛼当𤎫竮䗗; ; xn--snl253bgitxhzwu2arn60c; ; ;  # 陋㛼当𤎫竮䗗
+電𡍪弳䎫窮䵗; ; ; xn--kbo60w31ob3z6t3av9z5b; ; ;  # 電𡍪弳䎫窮䵗
+xn--kbo60w31ob3z6t3av9z5b; 電𡍪弳䎫窮䵗; ; xn--kbo60w31ob3z6t3av9z5b; ; ;  # 電𡍪弳䎫窮䵗
 
 # RANDOMIZED TESTS
 
diff --git a/unicodetools/src/main/java/org/unicode/idna/GenerateIdnaTest.java b/unicodetools/src/main/java/org/unicode/idna/GenerateIdnaTest.java
index 6fbe881ba..62d299211 100644
--- a/unicodetools/src/main/java/org/unicode/idna/GenerateIdnaTest.java
+++ b/unicodetools/src/main/java/org/unicode/idna/GenerateIdnaTest.java
@@ -935,5 +935,38 @@ public static UnicodeSet getIdna2008Valid() {
         "xn---",
         "xn--ASCII-",
         "xn--unicode-.org",
+        // Characters in NormalizationCorrections.txt.
+        // Escpecially ones that changed in Unicode 4.0, after IDNA2003 was baked.
+        // F951;96FB;964B;3.2.0 # Corrigendum 3
+        // 2F868;2136A;36FC;4.0.0 # Corrigendum 4
+        // 2F874;5F33;5F53;4.0.0 # Corrigendum 4
+        // 2F91F;43AB;243AB;4.0.0 # Corrigendum 4
+        // 2F95F;7AAE;7AEE;4.0.0 # Corrigendum 4
+        // 2F9BF;4D57;45D7;4.0.0 # Corrigendum 4
+        //
+        // source characters
+        new StringBuilder("\uF951")
+                .appendCodePoint(0x2F868)
+                .appendCodePoint(0x2F874)
+                .appendCodePoint(0x2F91F)
+                .appendCodePoint(0x2F95F)
+                .appendCodePoint(0x2F9BF)
+                .toString(),
+        // old decompositions
+        new StringBuilder("\u96FB")
+                .appendCodePoint(0x2136A)
+                .appendCodePoint(0x5F33)
+                .appendCodePoint(0x43AB)
+                .appendCodePoint(0x7AAE)
+                .appendCodePoint(0x4D57)
+                .toString(),
+        // corrected decompositions
+        new StringBuilder("\u964B")
+                .appendCodePoint(0x36FC)
+                .appendCodePoint(0x5F53)
+                .appendCodePoint(0x243AB)
+                .appendCodePoint(0x7AEE)
+                .appendCodePoint(0x45D7)
+                .toString(),
     };
 }