diff --git a/picopore/parse_args.py b/picopore/parse_args.py
index 5f8ecae..00a7274 100644
--- a/picopore/parse_args.py
+++ b/picopore/parse_args.py
@@ -27,17 +27,23 @@
 
 def checkDeprecatedArgs():
     args = sys.argv[1:]
+    if "--realtime" in args:
+        args.remove('--realtime')
+        args = ['picopore-realtime'] + args
+        warnings.warn("picopore --realtime will be deprecated in 1.3.0. Use picopore-realtime instead.",FutureWarning)
+    elif "--test" in args:
+        args.remove('--test')
+        args = ['picopore-test'] + args
+        warnings.warn("picopore --test will be deprecated in 1.3.0. Use picopore-test instead.",FutureWarning)
+    else:
+        return
+    p = subprocess.Popen(args)
     try:
-        if "--realtime" in args:
-            args.remove('--realtime')
-            warnings.warn("picopore --realtime will be deprecated in 1.3.0. Use picopore-realtime instead.",FutureWarning)
-            exit(subprocess.call(['picopore-realtime'] + args))
-        if "--test" in args:
-            args.remove('--test')
-            warnings.warn("picopore --test will be deprecated in 1.3.0. Use picopore-test instead.",FutureWarning)
-            exit(subprocess.call(['picopore-test'] + args))
+        p.wait()
     except KeyboardInterrupt:
-        exit(0)
+        p.send_signal(signal.SIGINT)
+        p.wait()
+    exit(p.returncode)
 
 def checkInputs(args):
     args.input = [os.path.abspath(i) for i in args.input]