diff --git a/system/Config/BaseService.php b/system/Config/BaseService.php
index 38bac37fdaa9..572b6cf576bd 100644
--- a/system/Config/BaseService.php
+++ b/system/Config/BaseService.php
@@ -288,6 +288,7 @@ public static function reset(bool $initAutoloader = false)
      */
     public static function resetSingle(string $name)
     {
+        $name = strtolower($name);
         unset(static::$mocks[$name], static::$instances[$name]);
     }
 
diff --git a/tests/system/Config/ServicesTest.php b/tests/system/Config/ServicesTest.php
index 7fed04f53aa3..5f8cc476ae88 100644
--- a/tests/system/Config/ServicesTest.php
+++ b/tests/system/Config/ServicesTest.php
@@ -343,6 +343,17 @@ public function testResetSingle()
         $this->assertSame($security, $security2);
     }
 
+    public function testResetSingleCaseInsensitive()
+    {
+        Services::injectMock('response', new MockResponse(new App()));
+        $someService = service('response');
+        $this->assertInstanceOf(MockResponse::class, $someService);
+
+        Services::resetSingle('Response');
+        $someService = service('response');
+        $this->assertNotInstanceOf(MockResponse::class, $someService);
+    }
+
     public function testFilters()
     {
         $result = Services::filters();