diff --git a/libcxx/utils/ssh.py b/libcxx/utils/ssh.py
--- a/libcxx/utils/ssh.py
+++ b/libcxx/utils/ssh.py
@@ -28,6 +28,7 @@
     parser.add_argument('--host', type=str, required=True)
     parser.add_argument('--execdir', type=str, required=True)
     parser.add_argument('--codesign_identity', type=str, required=False, default=None)
+    parser.add_argument('--test-executable', type=str, required=False, default=None)
     parser.add_argument('--env', type=str, nargs='*', required=False, default=dict())
     (args, remaining) = parser.parse_known_args(sys.argv[1:])
 
@@ -51,7 +52,9 @@
     # and changing their path when running on the remote host. It's also possible
     # for there to be no such executable, for example in the case of a .sh.cpp
     # test.
-    isTestExe = lambda exe: exe.endswith('.tmp.exe') and os.path.exists(exe)
+    def isTestExe(exe):
+        return (exe == args.test_executable or exe.endswith('.tmp.exe')) and os.path.exists(exe)
+
     pathOnRemote = lambda file: posixpath.join(tmp, os.path.basename(file))
 
     try: