diff --git a/llvm/utils/lit/lit/TestingConfig.py b/llvm/utils/lit/lit/TestingConfig.py
--- a/llvm/utils/lit/lit/TestingConfig.py
+++ b/llvm/utils/lit/lit/TestingConfig.py
@@ -19,6 +19,7 @@
             'PATH' : os.pathsep.join(litConfig.path +
                                      [os.environ.get('PATH','')]),
             'LLVM_DISABLE_CRASH_REPORT' : '1',
+            'LLVM_DISABLE_SYMBOLIZATION' : '1',
             }
 
         pass_vars = [