diff --git a/clang/bindings/python/tests/cindex/test_diagnostics.py b/clang/bindings/python/tests/cindex/test_diagnostics.py
--- a/clang/bindings/python/tests/cindex/test_diagnostics.py
+++ b/clang/bindings/python/tests/cindex/test_diagnostics.py
@@ -41,7 +41,7 @@
         self.assertEqual(tu.diagnostics[0].severity, Diagnostic.Warning)
         self.assertEqual(tu.diagnostics[0].location.line, 1)
         self.assertEqual(tu.diagnostics[0].location.column, 26)
-        self.assertRegexpMatches(tu.diagnostics[0].spelling,
+        self.assertRegex(tu.diagnostics[0].spelling,
             'use of GNU old-style.*')
         self.assertEqual(len(tu.diagnostics[0].fixits), 1)
         self.assertEqual(tu.diagnostics[0].fixits[0].range.start.line, 1)
@@ -56,7 +56,7 @@
         self.assertEqual(tu.diagnostics[0].severity, Diagnostic.Warning)
         self.assertEqual(tu.diagnostics[0].location.line, 1)
         self.assertEqual(tu.diagnostics[0].location.column, 16)
-        self.assertRegexpMatches(tu.diagnostics[0].spelling,
+        self.assertRegex(tu.diagnostics[0].spelling,
             'incompatible pointer to.*')
         self.assertEqual(len(tu.diagnostics[0].fixits), 0)
         self.assertEqual(len(tu.diagnostics[0].ranges), 1)
@@ -97,7 +97,7 @@
         children = d.children
         self.assertEqual(len(children), 1)
         self.assertEqual(children[0].severity, Diagnostic.Note)
-        self.assertRegexpMatches(children[0].spelling,
+        self.assertRegex(children[0].spelling,
                 '.*declared here')
         self.assertEqual(children[0].location.line, 1)
         self.assertEqual(children[0].location.column, 6)