diff --git a/Lib/cgi.py b/Lib/cgi.py
index 47c0279..fa8fd13 100755
--- a/Lib/cgi.py
+++ b/Lib/cgi.py
@@ -910,7 +910,7 @@
         print_environ(environ)
         print_environ_usage()
         def f():
-            exec "testing print_exception() -- <I>italics?</I>"
+            exec("testing print_exception() -- <I>italics?</I>")
         def g(f=f):
             f()
         print "<H3>What follows is a test, not an actual exception:</H3>"