diff --git a/PHPCSDebug/Tests/Debug/TokenListCssTest.php b/PHPCSDebug/Tests/Debug/TokenListCssTest.php
index ae391d4..202792d 100644
--- a/PHPCSDebug/Tests/Debug/TokenListCssTest.php
+++ b/PHPCSDebug/Tests/Debug/TokenListCssTest.php
@@ -113,9 +113,6 @@ public function testOutput()
 
 EOD;
 
-        $this->expectOutputString($expected);
-        $this->setOutputCallback([$this, 'normalizeLineEndings']);
-
         if (empty(self::$phpcsFile->ruleset->tokenListeners)) {
             // PHPCSUtils 1.0.9+.
             $sniffFile      = \dirname(\dirname(__DIR__)) . \DIRECTORY_SEPARATOR . 'Sniffs';
@@ -127,7 +124,13 @@ public function testOutput()
             self::$phpcsFile->ruleset->populateTokenListeners();
         }
 
+        \ob_start();
         self::$phpcsFile->process();
+
+        $output = \ob_get_contents();
+        \ob_end_clean();
+
+        $this->assertSame($expected, $this->normalizeLineEndings($output));
     }
 
     /**
diff --git a/PHPCSDebug/Tests/Debug/TokenListJsTest.php b/PHPCSDebug/Tests/Debug/TokenListJsTest.php
index 1c308f0..1d1c806 100644
--- a/PHPCSDebug/Tests/Debug/TokenListJsTest.php
+++ b/PHPCSDebug/Tests/Debug/TokenListJsTest.php
@@ -133,9 +133,6 @@ public function testOutput()
 
 EOD;
 
-        $this->expectOutputString($expected);
-        $this->setOutputCallback([$this, 'normalizeLineEndings']);
-
         if (empty(self::$phpcsFile->ruleset->tokenListeners)) {
             // PHPCSUtils 1.0.9+.
             $sniffFile      = \dirname(\dirname(__DIR__)) . \DIRECTORY_SEPARATOR . 'Sniffs';
@@ -147,7 +144,13 @@ public function testOutput()
             self::$phpcsFile->ruleset->populateTokenListeners();
         }
 
+        \ob_start();
         self::$phpcsFile->process();
+
+        $output = \ob_get_contents();
+        \ob_end_clean();
+
+        $this->assertSame($expected, $this->normalizeLineEndings($output));
     }
 
     /**
diff --git a/PHPCSDebug/Tests/Debug/TokenListUnitTest.php b/PHPCSDebug/Tests/Debug/TokenListUnitTest.php
index 3cbed60..2dd1292 100644
--- a/PHPCSDebug/Tests/Debug/TokenListUnitTest.php
+++ b/PHPCSDebug/Tests/Debug/TokenListUnitTest.php
@@ -106,9 +106,6 @@ public function testOutput()
 
 EOD;
 
-        $this->expectOutputString($expected);
-        $this->setOutputCallback([$this, 'normalizeLineEndings']);
-
         if (empty(self::$phpcsFile->ruleset->tokenListeners)) {
             // PHPCSUtils 1.0.9+.
             $sniffFile      = \dirname(\dirname(__DIR__)) . \DIRECTORY_SEPARATOR . 'Sniffs';
@@ -120,7 +117,13 @@ public function testOutput()
             self::$phpcsFile->ruleset->populateTokenListeners();
         }
 
+        \ob_start();
         self::$phpcsFile->process();
+
+        $output = \ob_get_contents();
+        \ob_end_clean();
+
+        $this->assertSame($expected, $this->normalizeLineEndings($output));
     }
 
     /**