diff --git a/.travis.sh b/.travis.sh
index 9eeecbeeb8..55020cb012 100644
--- a/.travis.sh
+++ b/.travis.sh
@@ -10,16 +10,15 @@ if [ -z "$components" ]; then
     exit 1
 fi
 echo '{"packages": {' > packages.json
-components=$(
-    for c in $components; do
-        sed -i ':a;N;$!ba;s#^{\n\(\s*\)\("name"\)#{\n\1"repositories": \[{ "type": "composer", "url": "file://'$(pwd)'/" }\],\n\1\2#' $c/composer.json
-        n=$(php -r '$n=json_decode(file_get_contents("'$c'/composer.json"));echo $n->name;')
-        echo '"'$n'": {"'$branch'.x-dev": ' >> packages.json
-        cat $c/composer.json >> packages.json
-        echo '"version": "'$branch.x-dev'",\n    "dist": {"type": "tar", "url": "file://'$(pwd)/$c'/package'$branch'.tar"}\n}},' >> packages.json
-        echo $c
-    done;
-)
+for c in $components; do
+    sed -i ':a;N;$!ba;s#^{\n\(\s*\)\("name"\)#{\n\1"repositories": \[{ "type": "composer", "url": "file://'$(pwd)'/" }\],\n\1\2#' $c/composer.json
+    n=$(php -r '$n=json_decode(file_get_contents("'$c'/composer.json"));echo $n->name;')
+    echo '"'$n'": {"'$branch'.x-dev": ' >> packages.json
+    cat $c/composer.json >> packages.json
+    echo '"version": "'$branch.x-dev'",\n    "dist": {"type": "tar", "url": "file://'$(pwd)/$c'/package'$branch'.tar"}\n}},' >> packages.json
+done;
 sed -i ':a;N;$!ba;s/\n}\n"/,\n    "/g' packages.json
 sed -i ':a;N;$!ba;s/}},$/\n}}\n}}/' packages.json
-echo "$components" | parallel --gnu "cd {}; tar -cf package$branch.tar --exclude='package*.tar' *"
+for c in $components; do
+    (cd $c && tar -cf package$branch.tar --exclude='package*.tar' *)
+done
diff --git a/src/Symfony/Component/BrowserKit/Response.php b/src/Symfony/Component/BrowserKit/Response.php
index d00836fa83..7a7130b95e 100644
--- a/src/Symfony/Component/BrowserKit/Response.php
+++ b/src/Symfony/Component/BrowserKit/Response.php
@@ -123,8 +123,9 @@ class Response
      */
     public function getHeader($header, $first = true)
     {
+        $normalizedHeader = str_replace('-', '_', strtolower($header));
         foreach ($this->headers as $key => $value) {
-            if (str_replace('-', '_', strtolower($key)) == str_replace('-', '_', strtolower($header))) {
+            if (str_replace('-', '_', strtolower($key)) === $normalizedHeader) {
                 if ($first) {
                     return is_array($value) ? (count($value) ? $value[0] : '') : $value;
                 }