diff --git a/tests/heredoctest.py b/tests/heredoctest.py
--- a/tests/heredoctest.py
+++ b/tests/heredoctest.py
@@ -5,7 +5,7 @@ lines = sys.stdin.readlines()
 while lines:
     l = lines.pop(0)
     if l.startswith('SALT'):
-        print l[:-1]
+        print(l[:-1])
     elif l.startswith('>>> '):
         snippet = l[4:]
         while lines and lines[0].startswith('... '):
@@ -13,6 +13,6 @@ while lines:
             snippet += l[4:]
         c = compile(snippet, '<heredoc>', 'single')
         try:
-            exec c in globalvars
-        except Exception, inst:
-            print repr(inst)
+            exec(c, globalvars)
+        except Exception as inst:
+            print(repr(inst))