diff --git a/tests/Navigator/UnstagedRecord.php b/tests/Navigator/UnstagedRecord.php
index 2fcc60d7..7b08b4eb 100644
--- a/tests/Navigator/UnstagedRecord.php
+++ b/tests/Navigator/UnstagedRecord.php
@@ -41,7 +41,7 @@ public function getMimeType()
         return 'text/html';
     }
 
-    public function CMSEditLink()
+    public function CMSEditLink(): ?string
     {
         return null;
     }
diff --git a/tests/Navigator/UnversionedRecord.php b/tests/Navigator/UnversionedRecord.php
index 81bd94ce..c994bb48 100644
--- a/tests/Navigator/UnversionedRecord.php
+++ b/tests/Navigator/UnversionedRecord.php
@@ -28,7 +28,7 @@ public function getMimeType()
         return 'text/html';
     }
 
-    public function CMSEditLink()
+    public function CMSEditLink(): ?string
     {
         return null;
     }
diff --git a/tests/Navigator/VersionedRecord.php b/tests/Navigator/VersionedRecord.php
index f3f5a496..3218a63f 100644
--- a/tests/Navigator/VersionedRecord.php
+++ b/tests/Navigator/VersionedRecord.php
@@ -35,7 +35,7 @@ public function getMimeType()
         return 'text/html';
     }
 
-    public function CMSEditLink()
+    public function CMSEditLink(): ?string
     {
         return null;
     }