diff --git a/exercises/practice/crypto-square/.meta/tests.toml b/exercises/practice/crypto-square/.meta/tests.toml
index 054544573..94ef0819f 100644
--- a/exercises/practice/crypto-square/.meta/tests.toml
+++ b/exercises/practice/crypto-square/.meta/tests.toml
@@ -1,10 +1,20 @@
-# This is an auto-generated file. Regular comments will be removed when this
-# file is regenerated. Regenerating will not touch any manually added keys,
-# so comments can be added in a "comment" key.
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
 
 [407c3837-9aa7-4111-ab63-ec54b58e8e9f]
 description = "empty plaintext results in an empty ciphertext"
 
+[aad04a25-b8bb-4304-888b-581bea8e0040]
+description = "normalization results in empty plaintext"
+
 [64131d65-6fd9-4f58-bdd8-4a2370fb481d]
 description = "Lowercase"
 
@@ -22,3 +32,8 @@ description = "8 character plaintext results in 3 chunks, the last one with a tr
 
 [fbcb0c6d-4c39-4a31-83f6-c473baa6af80]
 description = "54 character plaintext results in 7 chunks, the last two with trailing spaces"
+include = false
+
+[33fd914e-fa44-445b-8f38-ff8fbc9fe6e6]
+description = "54 character plaintext results in 8 chunks, the last two with trailing spaces"
+reimplements = "fbcb0c6d-4c39-4a31-83f6-c473baa6af80"
diff --git a/exercises/practice/crypto-square/CryptoSquareTests.fs b/exercises/practice/crypto-square/CryptoSquareTests.fs
index 42271a7cc..1cfd9ffa5 100644
--- a/exercises/practice/crypto-square/CryptoSquareTests.fs
+++ b/exercises/practice/crypto-square/CryptoSquareTests.fs
@@ -9,6 +9,10 @@ open CryptoSquare
 let ``Empty plaintext results in an empty ciphertext`` () =
     ciphertext "" |> should equal ""
 
+[<Fact(Skip = "Remove this Skip property to run this test")>]
+let ``Normalization results in empty plaintext`` () =
+    ciphertext "... --- ..." |> should equal ""
+
 [<Fact(Skip = "Remove this Skip property to run this test")>]
 let ``Lowercase`` () =
     ciphertext "A" |> should equal "a"
@@ -30,6 +34,6 @@ let ``8 character plaintext results in 3 chunks, the last one with a trailing sp
     ciphertext "Chill out." |> should equal "clu hlt io "
 
 [<Fact(Skip = "Remove this Skip property to run this test")>]
-let ``54 character plaintext results in 7 chunks, the last two with trailing spaces`` () =
+let ``54 character plaintext results in 8 chunks, the last two with trailing spaces`` () =
     ciphertext "If man was meant to stay on the ground, god would have given us roots." |> should equal "imtgdvs fearwer mayoogo anouuio ntnnlvt wttddes aohghn  sseoau "