diff --git a/test/lit.cfg b/test/lit.cfg
index dc72b46b7..ec05d1c7c 100644
--- a/test/lit.cfg
+++ b/test/lit.cfg
@@ -36,24 +36,6 @@ class LibcxxTestFormat(lit.formats.FileBasedTest):
         self.ld_flags = list(ld_flags)
         self.exec_env = dict(exec_env)
 
-    def execute_command(self, command, in_dir=None):
-        kwargs = {
-            'stdin' :subprocess.PIPE,
-            'stdout':subprocess.PIPE,
-            'stderr':subprocess.PIPE,
-        }
-        if in_dir:
-            kwargs['cwd'] = in_dir
-        p = subprocess.Popen(command, **kwargs)
-        out, err = p.communicate()
-        exitCode = p.wait()
-
-        # Detect Ctrl-C in subprocess.
-        if exitCode == -signal.SIGINT:
-            raise KeyboardInterrupt
-
-        return out, err, exitCode
-
     def execute(self, test, lit_config):
         while True:
             try:
@@ -121,7 +103,7 @@ class LibcxxTestFormat(lit.formats.FileBasedTest):
         if use_verify:
             cmd += ['-Xclang', '-verify']
 
-        out, err, rc = self.execute_command(cmd)
+        out, err, rc = lit.util.executeCommand(cmd)
         return cmd, out, err, rc
 
     def _clean(self, exec_path):
@@ -136,7 +118,7 @@ class LibcxxTestFormat(lit.formats.FileBasedTest):
         cmd.append(exec_path)
         if lit_config.useValgrind:
             cmd = lit_config.valgrindArgs + cmd
-        out, err, exitCode = self.execute_command(cmd, in_dir)
+        out, err, exitCode = lit.util.executeCommand(cmd, cwd=in_dir)
         return cmd, out, err, exitCode
 
     def _evaluate_test(self, test, use_verify, lit_config):