Fixing tests environemnt...

.travis.yml

@@ -21,9 +21,6 @@ cache:
   directories:
     - $HOME/.composer/cache
 
-before_install:
-  - phpenv config-rm xdebug.ini || echo "xdebug is not installed"
-
 install:
   - travis_retry composer self-update && composer --version
   - export PATH="$HOME/.composer/vendor/bin:$PATH"
@@ -43,7 +40,7 @@ before_script:
     fi
 
 script:
-  - phpdbg -qrr vendor/bin/phpunit --verbose $PHPUNIT_COVERAGE_FLAG
+  - vendor/bin/phpunit --verbose $PHPUNIT_COVERAGE_FLAG
   - |
     if [ $TASK_STATIC_ANALYSIS == 1 ]; then
       composer phan

phpunit.xml.dist

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <phpunit bootstrap="tests/bootstrap.php"
-    backupGlobals="true"
     colors="true"
     verbose="true"
     failOnRisky="true"

tests/Emitter/HTTPFunctions.php

@@ -31,9 +31,9 @@ public static function reset(): void
      */
     public static function header(string $string, bool $replace = true, ?int $http_response_code = null): void
     {
-        if (substr($string, 0, 5) !== 'HTTP/') {
-            $header = strtolower(explode(':', $string)[0]);
-            if ($replace || !key_exists($header, self::$headers)) {
+        if (strpos($string, 'HTTP/') !== 0) {
+            $header = strtolower(explode(':', $string, 2)[0]);
+            if ($replace || !array_key_exists($header, self::$headers)) {
                 self::$headers[$header] = [];
             }
             self::$headers[$header][] = $string;