--- a/tests/hghave.py	Mon Jul 01 14:19:04 2013 +0100
+++ b/tests/hghave.py	Fri Jul 19 00:37:26 2013 +0100
@@ -105,7 +105,7 @@
     sock = socket.socket(socket.AF_UNIX)
     try:
         sock.bind(name)
-    except socket.error, err:
+    except socket.error:
         return False
     sock.close()
     os.unlink(name)
@@ -274,6 +274,9 @@
 def has_msys():
     return os.getenv('MSYSTEM')
 
+def has_aix():
+    return sys.platform.startswith("aix")
+
 checks = {
     "true": (lambda: True, "yak shaving"),
     "false": (lambda: False, "nail clipper"),
@@ -314,4 +317,5 @@
     "unix-permissions": (has_unix_permissions, "unix-style permissions"),
     "windows": (has_windows, "Windows"),
     "msys": (has_msys, "Windows with MSYS"),
+    "aix": (has_aix, "AIX"),
 }