diff --git a/tests/ErrorHandlerTest.php b/tests/ErrorHandlerTest.php
index acd9d5d..2e76433 100644
--- a/tests/ErrorHandlerTest.php
+++ b/tests/ErrorHandlerTest.php
@@ -426,7 +426,7 @@ public function provideExceptionMessage()
                 "bin��������ary"
             ],
             [
-                utf8_decode("hellö!"),
+                "hell\xF6!",
                 "hell�!"
             ]
         ];
diff --git a/tests/HtmlHandlerTest.php b/tests/HtmlHandlerTest.php
index 64ce348..ed29580 100644
--- a/tests/HtmlHandlerTest.php
+++ b/tests/HtmlHandlerTest.php
@@ -59,7 +59,7 @@ public function provideNames()
                 'h<e>llo'
             ],
             [
-                utf8_decode('hellö.txt'),
+                "hell\xF6.txt",
                 'hell�.txt'
             ],
             [