diff --git a/.travis.yml b/.travis.yml
index 33eb93f..1dfecf4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,16 +8,13 @@ php:
     - '7.1'
     - '7.2'
     - '7.3'
-    - nightly
 
 jobs:
+    fast_finish: true
     include:
     - php: 7.4
       env: LINTER_RUN=run
-
-    fast_finish: true
-    allow_failures:
-        - php: nightly
+    - php: nightly
 
 install:
     - composer update --prefer-dist --no-progress --no-suggest --optimize-autoloader
diff --git a/composer.json b/composer.json
index 9d8d94e..7182f0b 100644
--- a/composer.json
+++ b/composer.json
@@ -37,9 +37,9 @@
         "php": "^7.1|^8.0"
     },
     "require-dev" : {
-        "friendsofphp/php-cs-fixer": "^2.16.3",
+        "friendsofphp/php-cs-fixer": "*",
         "phpstan/phpstan": "^0.12.36",
-        "phpunit/phpunit": "^7"
+        "phpunit/phpunit": "^7 || ^8 || ^9"
     },
     "scripts": {
         "cs": "vendor/bin/php-cs-fixer fix",
diff --git a/src/N3Lexer.php b/src/N3Lexer.php
index e2400c6..1bd1960 100644
--- a/src/N3Lexer.php
+++ b/src/N3Lexer.php
@@ -467,7 +467,7 @@ private function initTokenize()
             $this->input .= $input;
             $tokens = [];
             $error = '';
-            $this->input = $this->tokenizeToEnd(function ($e, $t) use (&$tokens,&$error) {
+            $this->input = $this->tokenizeToEnd(function ($e, $t) use (&$tokens, &$error) {
                 if (isset($e)) {
                     $error = $e;
                 }
diff --git a/test/TriGParserTest.php b/test/TriGParserTest.php
index f005e2e..925a2b8 100644
--- a/test/TriGParserTest.php
+++ b/test/TriGParserTest.php
@@ -60,11 +60,11 @@ public function shouldNotParse($createParser, $input, $expectedError = null): vo
         $parser->parse($input, function ($error, $triple = null) use ($expectedError, &$errorReceived) {
             //expect($error).not.to.exist;
             if (isset($error) && !$errorReceived) {
-                $this->assertEquals($expectedError, $error->getMessage());
                 $errorReceived = true;
+                $this->assertEquals($expectedError, $error->getMessage());
             } elseif (!isset($triple) && !$errorReceived) {
-                $this->fail("Expected this error to be thrown (but it wasn't): ".$expectedError);
                 $errorReceived = true;
+                $this->fail("Expected this error to be thrown (but it wasn't): ".$expectedError);
             }
         });
     }