diff --git a/llvm/test/Support/interrupts.test b/llvm/test/Support/interrupts.test
index 86730f5139c04..752426c5292b0 100644
--- a/llvm/test/Support/interrupts.test
+++ b/llvm/test/Support/interrupts.test
@@ -10,7 +10,8 @@ import sys
 import time
 
 def run_symbolizer():
-    proc = subprocess.Popen([sys.argv[2]], stdout=subprocess.PIPE, stdin=subprocess.PIPE)
+    proc = subprocess.Popen([sys.argv[2]], stdout=subprocess.PIPE,
+                            stdin=subprocess.PIPE, stderr=sys.stderr)
     # Write then read some output to ensure the process has started fully.
     proc.stdin.write(b'foo bar\n')
     proc.stdin.flush()
@@ -29,13 +30,10 @@ def run_wrapper():
     if os.name == 'nt':
         startupinfo = subprocess.STARTUPINFO()
         startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
-        proc = subprocess.Popen(args,
-                                stderr=sys.stderr,
-                                startupinfo=startupinfo,
-                                creationflags=subprocess.CREATE_NEW_CONSOLE)
+        subprocess.run(args, stderr=sys.stderr, startupinfo=startupinfo,
+                       creationflags=subprocess.CREATE_NEW_CONSOLE)
     else:
-        proc = subprocess.Popen(args,
-                                stderr=subprocess.PIPE)
+        subprocess.run(args, stderr=sys.stderr)
 
 if sys.argv[1] == 'wrapper':
     run_wrapper()