diff --git a/e107_tests/tests/unit/pluginsTest.php b/e107_tests/tests/unit/pluginsTest.php
index 5c02d14ee..09b44af89 100644
--- a/e107_tests/tests/unit/pluginsTest.php
+++ b/e107_tests/tests/unit/pluginsTest.php
@@ -389,8 +389,10 @@
 
 		private function pluginInstall($pluginDir)
 		{
+			e107::getPlugin()->uninstall($pluginDir);
 
-			e107::getPlugin()->install($pluginDir);
+			$return_text = e107::getPlugin()->install($pluginDir);
+			$this->assertNotEquals("Plugin is already installed.", $return_text);
 
 			$install = $this->makePluginReport($pluginDir);