diff --git a/lldb/packages/Python/lldbsuite/test/api/multithreaded/TestMultithreaded.py b/lldb/packages/Python/lldbsuite/test/api/multithreaded/TestMultithreaded.py
index 36c4d9282624..4e550c9c24db 100644
--- a/lldb/packages/Python/lldbsuite/test/api/multithreaded/TestMultithreaded.py
+++ b/lldb/packages/Python/lldbsuite/test/api/multithreaded/TestMultithreaded.py
@@ -101,7 +101,7 @@ class SBBreakpointCallbackCase(TestBase):
         exe = [test_exe, self.getBuildArtifact(self.inferior)]
 
         env = {self.dylibPath: self.getLLDBLibraryEnvVal()}
-        if os.environ['LLDB_DEBUGSERVER_PATH']:
+        if 'LLDB_DEBUGSERVER_PATH' in os.environ:
             env['LLDB_DEBUGSERVER_PATH'] = os.environ['LLDB_DEBUGSERVER_PATH']
         if self.TraceOn():
             print("Running test %s" % " ".join(exe))