Index: packages/Python/lldbsuite/test/dotest.py
===================================================================
--- packages/Python/lldbsuite/test/dotest.py
+++ packages/Python/lldbsuite/test/dotest.py
@@ -673,16 +673,15 @@
 
     # Assume lldb-mi is in same place as lldb
     # If not found, disable the lldb-mi tests
-    lldbMiExec = None
-    if lldbtest_config.lldbExec and is_exe(lldbtest_config.lldbExec + "-mi"):
-        lldbMiExec = lldbtest_config.lldbExec + "-mi"
-    if not lldbMiExec:
+    lldbDir = os.path.dirname(lldbtest_config.lldbExec)
+    lldbMiExec = os.path.join(lldbDir, "lldb-mi")
+    if is_exe(lldbMiExec):
+        os.environ["LLDBMI_EXEC"] = lldbMiExec
+    else:
         if not configuration.shouldSkipBecauseOfCategories(["lldb-mi"]):
             print(
                 "The 'lldb-mi' executable cannot be located.  The lldb-mi tests can not be run as a result.")
             configuration.skipCategories.append("lldb-mi")
-    else:
-        os.environ["LLDBMI_EXEC"] = lldbMiExec
 
     lldbPythonDir = None  # The directory that contains 'lldb/__init__.py'
     if configuration.lldbFrameworkPath: