diff --git a/test/lit.cfg b/test/lit.cfg
index a20cfeea9..4dd440702 100644
--- a/test/lit.cfg
+++ b/test/lit.cfg
@@ -327,17 +327,16 @@ if(config.have_enzyme):
 # Ask llvm-config about assertion mode and build-mode.
 try:
     llvm_config_cmd = subprocess.Popen(
-        [os.path.join(llvm_tools_dir, 'llvm-config'), '--assertion-mode --build-mode'],
+        [os.path.join(llvm_tools_dir, 'llvm-config'), '--assertion-mode', '--build-mode'],
         stdout = subprocess.PIPE,
         env=config.environment)
 except OSError:
     print("Could not find llvm-config in " + llvm_tools_dir)
     exit(42)
-
 res=llvm_config_cmd.stdout.read().decode('ascii')
+llvm_config_cmd.wait()
+
 if re.search(r'ON', res):
     config.available_features.add('asserts')
 if re.search(r'[Dd][Ee][Bb][Uu][Gg]', res):
     config.available_features.add('debug')
-
-llvm_config_cmd.wait()