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
@@ -237,6 +237,10 @@
 
     opts.reports = filter(None, [opts.output, opts.xunit_xml_output, opts.resultdb_output, opts.time_trace_output])
 
+    # Convert path arguments to absolute paths, so they can be referenced
+    # anywhere.
+    opts.path = [os.path.abspath(p) for p in opts.path]
+
     return opts
 
 
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