diff --git a/system/Test/Mock/MockResult.php b/system/Test/Mock/MockResult.php
index f3ca02651bfc..9c5f55e98fdc 100644
--- a/system/Test/Mock/MockResult.php
+++ b/system/Test/Mock/MockResult.php
@@ -77,6 +77,7 @@ public function dataSeek($n = 0)
      */
     protected function fetchAssoc()
     {
+        return [];
     }
 
     /**
diff --git a/utils/phpstan-baseline/loader.neon b/utils/phpstan-baseline/loader.neon
index a80c14474bf8..9759968e53f5 100644
--- a/utils/phpstan-baseline/loader.neon
+++ b/utils/phpstan-baseline/loader.neon
@@ -43,7 +43,6 @@ includes:
     - property.readOnlyByPhpDocAssignOutOfClass.neon
     - property.readOnlyByPhpDocDefaultValue.neon
     - property.unusedType.neon
-    - return.missing.neon
     - return.type.neon
     - return.unusedType.neon
     - staticMethod.notFound.neon
diff --git a/utils/phpstan-baseline/return.missing.neon b/utils/phpstan-baseline/return.missing.neon
deleted file mode 100644
index 151fdaa34156..000000000000
--- a/utils/phpstan-baseline/return.missing.neon
+++ /dev/null
@@ -1,13 +0,0 @@
-# total 2 errors
-
-parameters:
-    ignoreErrors:
-        -
-            message: '#^Method CodeIgniter\\Images\\Handlers\\BaseHandler\:\:__call\(\) should return mixed but return statement is missing\.$#'
-            count: 1
-            path: ../../system/Images/Handlers/BaseHandler.php
-
-        -
-            message: '#^Method CodeIgniter\\Test\\Mock\\MockResult\:\:fetchAssoc\(\) should return mixed but return statement is missing\.$#'
-            count: 1
-            path: ../../system/Test/Mock/MockResult.php