diff --git a/llvm/test/lit.cfg b/llvm/test/lit.cfg
index 7ec23e3545a9..fef6d78902bc 100644
--- a/llvm/test/lit.cfg
+++ b/llvm/test/lit.cfg
@@ -176,9 +176,9 @@ for pattern in [r"\bbugpoint\b(?!-)",   r"(?<!/)\bclang\b(?!-)",
                 r"\bllvm-stub\b",       r"\bllvm2cpp\b",
                 # Don't match '-llvmc'.
                 r"(?<!-)\bllvmc\b",     r"\blto\b",
-                                        # Don't match '.opt', '-opt'
-                                        # or '^opt'.
-                r"\bmacho-dump\b",      r"(?<!\.|-|\^)\bopt\b",
+                                        # Don't match '.opt', '-opt',
+                                        # '^opt' or '/opt'.
+                r"\bmacho-dump\b",      r"(?<!\.|-|\^|/)\bopt\b",
                 r"\btblgen\b",          r"\bFileCheck\b",
                 r"\bFileUpdate\b",      r"\bc-index-test\b",
                 r"\bfpcmp\b",           r"\bllvm-PerfectShuffle\b",