diff --git a/tests/MinifyClosureCompilerTest.php b/tests/MinifyClosureCompilerTest.php
index e7f8f8a..ad253bf 100644
--- a/tests/MinifyClosureCompilerTest.php
+++ b/tests/MinifyClosureCompilerTest.php
@@ -71,6 +71,10 @@ class MinifyClosureCompilerTest extends TestCase
     protected function assertHasJar()
     {
         $this->assertNotEmpty(Minify_ClosureCompiler::$jarFile);
-        $this->assertFileExists(Minify_ClosureCompiler::$jarFile, "Have closure compiler compiler.jar");
+        try {
+            $this->assertFileExists(Minify_ClosureCompiler::$jarFile, "Have closure compiler compiler.jar");
+        } catch (Exception $e) {
+            $this->markTestSkipped($e->getMessage());
+        }
     }
 }
\ No newline at end of file
diff --git a/tests/MinifyYuiCSSTest.php b/tests/MinifyYuiCSSTest.php
index 32002f6..bbbc796 100644
--- a/tests/MinifyYuiCSSTest.php
+++ b/tests/MinifyYuiCSSTest.php
@@ -47,7 +47,11 @@ class MinifyYuiCSSTest extends TestCase
 
     protected function assertHasJar()
     {
-        $this->assertNotEmpty(Minify_YUICompressor::$jarFile );
-        $this->assertFileExists(Minify_YUICompressor::$jarFile , "Have YUI yuicompressor.jar");
+        $this->assertNotEmpty(Minify_YUICompressor::$jarFile);
+        try {
+            $this->assertFileExists(Minify_YUICompressor::$jarFile , "Have YUI yuicompressor.jar");
+        } catch (Exception $e) {
+            $this->markTestSkipped($e->getMessage());
+        }
     }
 }
\ No newline at end of file