diff --git a/exercises/practice/pangram/.meta/tests.toml b/exercises/practice/pangram/.meta/tests.toml
index 7c35818f..10b5a335 100644
--- a/exercises/practice/pangram/.meta/tests.toml
+++ b/exercises/practice/pangram/.meta/tests.toml
@@ -38,3 +38,8 @@ description = "mixed case and punctuation"
 
 [2577bf54-83c8-402d-a64b-a2c0f7bb213a]
 description = "case insensitive"
+include = false
+
+[7138e389-83e4-4c6e-8413-1e40a0076951]
+description = "a-m and A-M are 26 different characters but not a pangram"
+reimplements = "2577bf54-83c8-402d-a64b-a2c0f7bb213a"
diff --git a/exercises/practice/pangram/source/pangram.d b/exercises/practice/pangram/source/pangram.d
index 3e5ab27e..cd9fa2a4 100644
--- a/exercises/practice/pangram/source/pangram.d
+++ b/exercises/practice/pangram/source/pangram.d
@@ -33,7 +33,7 @@ unittest
         // Mixed case and punctuation
         assert(isPangram("\"Five quacking Zephyrs jolt my wax bed\""));
 
-        // Case insensitive
-        assert(!isPangram("the quick brown fox jumps over with lazy FX"));
+        // a-m and A-M are 26 different characters but not a pangram
+        assert(!isPangram("abcdefghijklm ABCDEFGHIJKLM"));
     }
 }