diff --git a/pytest/test_grammar.py b/pytest/test_grammar.py
index b92e163d..fd18b2b0 100644
--- a/pytest/test_grammar.py
+++ b/pytest/test_grammar.py
@@ -14,7 +14,7 @@ def test_grammar():
             "Remaining tokens %s\n====\n%s" % (remain_tokens, p.dump_grammar())
 
     p = get_python_parser(PYTHON_VERSION, is_pypy=IS_PYPY)
-    lhs, rhs, tokens, right_recursive = p.checkSets()
+    lhs, rhs, tokens, right_recursive = p.check_sets()
     expect_lhs = set(['expr1024', 'pos_arg'])
     unused_rhs = set(['build_list', 'call_function', 'mkfunc',
                       'mklambda',
diff --git a/uncompyle6/parsers/parse26.py b/uncompyle6/parsers/parse26.py
index c68efb8c..1f453b52 100644
--- a/uncompyle6/parsers/parse26.py
+++ b/uncompyle6/parsers/parse26.py
@@ -279,7 +279,7 @@ if __name__ == '__main__':
     p.check_grammar()
     from uncompyle6 import PYTHON_VERSION, IS_PYPY
     if PYTHON_VERSION == 2.6:
-        lhs, rhs, tokens, right_recursive = p.checkSets()
+        lhs, rhs, tokens, right_recursive = p.check_sets()
         from uncompyle6.scanner import get_scanner
         s = get_scanner(PYTHON_VERSION, IS_PYPY)
         opcode_set = set(s.opc.opname).union(set(
diff --git a/uncompyle6/parsers/parse27.py b/uncompyle6/parsers/parse27.py
index 953ba5ac..e392da5e 100644
--- a/uncompyle6/parsers/parse27.py
+++ b/uncompyle6/parsers/parse27.py
@@ -132,7 +132,7 @@ if __name__ == '__main__':
     p.check_grammar()
     from uncompyle6 import PYTHON_VERSION, IS_PYPY
     if PYTHON_VERSION == 2.7:
-        lhs, rhs, tokens, right_recursive = p.checkSets()
+        lhs, rhs, tokens, right_recursive = p.check_sets()
         from uncompyle6.scanner import get_scanner
         s = get_scanner(PYTHON_VERSION, IS_PYPY)
         opcode_set = set(s.opc.opname).union(set(
diff --git a/uncompyle6/parsers/parse34.py b/uncompyle6/parsers/parse34.py
index bd6be275..bba5c29d 100644
--- a/uncompyle6/parsers/parse34.py
+++ b/uncompyle6/parsers/parse34.py
@@ -32,7 +32,7 @@ if __name__ == '__main__':
     p.check_grammar()
     from uncompyle6 import PYTHON_VERSION, IS_PYPY
     if PYTHON_VERSION == 3.4:
-        lhs, rhs, tokens, right_recursive = p.checkSets()
+        lhs, rhs, tokens, right_recursive = p.check_sets()
         from uncompyle6.scanner import get_scanner
         s = get_scanner(PYTHON_VERSION, IS_PYPY)
         opcode_set = set(s.opc.opname).union(set(
diff --git a/uncompyle6/parsers/parse35.py b/uncompyle6/parsers/parse35.py
index 12bd5fbd..52b6e112 100644
--- a/uncompyle6/parsers/parse35.py
+++ b/uncompyle6/parsers/parse35.py
@@ -167,7 +167,7 @@ if __name__ == '__main__':
     p.check_grammar()
     from uncompyle6 import PYTHON_VERSION, IS_PYPY
     if PYTHON_VERSION == 3.5:
-        lhs, rhs, tokens, right_recursive = p.checkSets()
+        lhs, rhs, tokens, right_recursive = p.check_sets()
         from uncompyle6.scanner import get_scanner
         s = get_scanner(PYTHON_VERSION, IS_PYPY)
         opcode_set = set(s.opc.opname).union(set(
diff --git a/uncompyle6/parsers/parse36.py b/uncompyle6/parsers/parse36.py
index 7a369997..87bbd4f8 100644
--- a/uncompyle6/parsers/parse36.py
+++ b/uncompyle6/parsers/parse36.py
@@ -81,7 +81,7 @@ if __name__ == '__main__':
     p.check_grammar()
     from uncompyle6 import PYTHON_VERSION, IS_PYPY
     if PYTHON_VERSION == 3.6:
-        lhs, rhs, tokens, right_recursive = p.checkSets()
+        lhs, rhs, tokens, right_recursive = p.check_sets()
         from uncompyle6.scanner import get_scanner
         s = get_scanner(PYTHON_VERSION, IS_PYPY)
         opcode_set = set(s.opc.opname).union(set(
diff --git a/uncompyle6/parsers/parse37.py b/uncompyle6/parsers/parse37.py
index 2b04a113..50cb3a50 100644
--- a/uncompyle6/parsers/parse37.py
+++ b/uncompyle6/parsers/parse37.py
@@ -24,7 +24,7 @@ if __name__ == '__main__':
     p.check_grammar()
     from uncompyle6 import PYTHON_VERSION, IS_PYPY
     if PYTHON_VERSION == 3.7:
-        lhs, rhs, tokens, right_recursive = p.checkSets()
+        lhs, rhs, tokens, right_recursive = p.check_sets()
         from uncompyle6.scanner import get_scanner
         s = get_scanner(PYTHON_VERSION, IS_PYPY)
         opcode_set = set(s.opc.opname).union(set(