diff --git a/llvm/utils/lit/lit/cl_arguments.py b/llvm/utils/lit/lit/cl_arguments.py
--- a/llvm/utils/lit/lit/cl_arguments.py
+++ b/llvm/utils/lit/lit/cl_arguments.py
@@ -92,7 +92,8 @@
     execution_group.add_argument("--path",
             help="Additional paths to add to testing environment",
             action="append",
-            default=[])
+            default=[],
+            type=os.path.abspath)
     execution_group.add_argument("--vg",
             dest="useValgrind",
             help="Run tests under valgrind",
diff --git a/llvm/utils/lit/lit/util.py b/llvm/utils/lit/lit/util.py
--- a/llvm/utils/lit/lit/util.py
+++ b/llvm/utils/lit/lit/util.py
@@ -232,7 +232,7 @@
         for ext in pathext:
             p = os.path.join(path, command + ext)
             if os.path.exists(p) and not os.path.isdir(p):
-                return os.path.normcase(os.path.normpath(p))
+                return os.path.normcase(os.path.abspath(p))
 
     return None