diff --git a/Lib/pdb.py b/Lib/pdb.py
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -356,8 +356,8 @@
 
     def default(self, line):
         if line[:1] == '!': line = line[1:]
-        locals = self.curframe_locals
-        globals = self.curframe.f_globals
+        ns = self.curframe.f_globals.copy()
+        ns.update(self.curframe_locals)
         try:
             code = compile(line + '\n', '<stdin>', 'single')
             save_stdout = sys.stdout
@@ -367,7 +367,7 @@
                 sys.stdin = self.stdin
                 sys.stdout = self.stdout
                 sys.displayhook = self.displayhook
-                exec(code, globals, locals)
+                exec(code, ns)
             finally:
                 sys.stdout = save_stdout
                 sys.stdin = save_stdin