diff --git a/llvm/test/tools/llvm-reduce/disable-crash-reports.test b/llvm/test/tools/llvm-reduce/disable-crash-reports.test
--- a/llvm/test/tools/llvm-reduce/disable-crash-reports.test
+++ b/llvm/test/tools/llvm-reduce/disable-crash-reports.test
@@ -2,7 +2,7 @@
 
 # RUN: env LLVM_DISABLE_CRASH_REPORT=0 llvm-reduce --delta-passes=global-variables -o %t --test %python --test-arg %p/Inputs/test-crash-vars.py %p/Inputs/test-output-format.ll 2>&1 | FileCheck -check-prefix=INTERESTING %s
 
-# RUN: not llvm-reduce --preserve-debug-environment --delta-passes=global-variables -o %t --test %python --test-arg %p/Inputs/test-crash-vars.py %p/Inputs/test-output-format.ll 2>&1 | FileCheck -check-prefix=NOTINTERESTING %s
+# RUN: env LLVM_DISABLE_SYMBOLIZATION=0 not llvm-reduce --preserve-debug-environment --delta-passes=global-variables -o %t --test %python --test-arg %p/Inputs/test-crash-vars.py %p/Inputs/test-output-format.ll 2>&1 | FileCheck -check-prefix=NOTINTERESTING %s
 
 # RUN: env LLVM_DISABLE_CRASH_REPORT=0 not llvm-reduce --preserve-debug-environment --delta-passes=global-variables -o %t --test %python --test-arg %p/Inputs/test-crash-vars.py %p/Inputs/test-output-format.ll 2>&1 | FileCheck -check-prefix=NOTINTERESTING %s
 
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 = [