diff --git a/tests/Composer/Test/Package/Archiver/ArchiveManagerTest.php b/tests/Composer/Test/Package/Archiver/ArchiveManagerTest.php
index a93fe6de6..946ecff5d 100644
--- a/tests/Composer/Test/Package/Archiver/ArchiveManagerTest.php
+++ b/tests/Composer/Test/Package/Archiver/ArchiveManagerTest.php
@@ -115,7 +115,7 @@ class ArchiveManagerTest extends ArchiverTest
         chdir($this->testDir);
 
         $output = null;
-        $result = $this->process->execute('git init -q', $output, $this->testDir);
+        $result = $this->process->execute('git init -q -b master', $output, $this->testDir);
         if ($result > 0) {
             chdir($currentWorkDir);
             throw new \RuntimeException('Could not init: '.$this->process->getErrorOutput());
diff --git a/tests/Composer/Test/Repository/VcsRepositoryTest.php b/tests/Composer/Test/Repository/VcsRepositoryTest.php
index e2cd81e61..b3cebfc14 100644
--- a/tests/Composer/Test/Repository/VcsRepositoryTest.php
+++ b/tests/Composer/Test/Repository/VcsRepositoryTest.php
@@ -58,7 +58,7 @@ class VcsRepositoryTest extends TestCase
             }
         };
 
-        $exec('git init');
+        $exec('git init -q -b master');
         $exec('git config user.email composertest@example.org');
         $exec('git config user.name ComposerTest');
         $exec('git config commit.gpgsign false');