diff --git a/exercises/atbash-cipher/canonical-data.json b/exercises/atbash-cipher/canonical-data.json
index 43241c965..bef84eed6 100644
--- a/exercises/atbash-cipher/canonical-data.json
+++ b/exercises/atbash-cipher/canonical-data.json
@@ -46,11 +46,6 @@
                 "description": "encode all the letters",
                 "phrase": "The quick brown fox jumps over the lazy dog.",
                 "expected": "gsvjf rxpyi ldmul cqfnk hlevi gsvoz abwlt"
-            },
-            {
-                "description": "encode ignores non ascii",
-                "phrase": "non ascii éignored",
-                "expected": "mlmzh xrrrt mlivw"
             }
         ]
     },
diff --git a/exercises/forth/canonical-data.json b/exercises/forth/canonical-data.json
index 47e861741..058de1307 100644
--- a/exercises/forth/canonical-data.json
+++ b/exercises/forth/canonical-data.json
@@ -17,13 +17,6 @@
           "1 2 3 4 5"
         ],
         "expected": [1, 2, 3, 4, 5]
-      },
-      {
-        "description": "all non-word characters are separators",
-        "input": [
-          "1\u00002\u00133\n4\r5 6\t7"
-        ],
-        "expected": [1, 2, 3, 4, 5, 6, 7]
       }
     ]
   },
@@ -308,13 +301,6 @@
         ],
         "expected": [1, 1]
       },
-      {
-        "description": "can consist of arbitrary characters such as Unicode characters",
-        "input": [
-          ": € 220371 ; €"
-        ],
-        "expected": [220371]
-      },
       {
         "description": "cannot redefine numbers",
         "input": [
diff --git a/exercises/scrabble-score/canonical-data.json b/exercises/scrabble-score/canonical-data.json
index bb4634193..02399465e 100644
--- a/exercises/scrabble-score/canonical-data.json
+++ b/exercises/scrabble-score/canonical-data.json
@@ -45,11 +45,6 @@
       "input": "pinata",
       "expected": 8
     },
-    {
-      "description": "non-english letter is not scored",
-      "input": "piñata",
-      "expected": 7
-    },
     {
       "description": "empty input",
       "input": "",