diff -urN asyncpg-0.20.1-orig/tests/test_pool.py asyncpg-0.20.1/tests/test_pool.py
--- asyncpg-0.20.1-orig/tests/test_pool.py	2020-05-10 21:55:48.209528164 -0400
+++ asyncpg-0.20.1/tests/test_pool.py	2020-05-10 21:56:23.459966715 -0400
@@ -242,8 +242,8 @@
 
             with self.assertRaisesRegex(
                     asyncpg.InterfaceError,
-                    r'cannot call Cursor\.forward.*released '
-                    r'back to the pool'.format(meth=meth)):
+                    r'cannot call Cursor\.{meth}.*released '
+                    r'back to the pool'.format(meth='forward')):
 
                 c.forward(1)