3 files changed, 24 insertions, 1 deletions
diff --git a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py
index 95fea33..063f603 100644
--- a/Lib/importlib/_bootstrap.py
+++ b/Lib/importlib/_bootstrap.py
@@ -917,6 +917,8 @@ def __import__(name, globals={}, locals={}, fromlist=[], level=0):
     import (e.g. ``from ..pkg import mod`` would have a 'level' of 2).
 
     """
+    if not hasattr(name, 'rpartition'):
+        raise TypeError("module name must be str, not {}".format(type(name)))
     if level == 0:
         module = _gcd_import(name)
     else:
diff --git a/Lib/importlib/test/import_/test_api.py b/Lib/importlib/test/import_/test_api.py
new file mode 100644
index 0000000..9075d42
--- /dev/null
+++ b/Lib/importlib/test/import_/test_api.py
@@ -0,0 +1,22 @@
+from . import util
+import unittest
+
+
+class APITest(unittest.TestCase):
+
+    """Test API-specific details for __import__ (e.g. raising the right
+    exception when passing in an int for the module name)."""
+
+    def test_name_requires_rparition(self):
+        # Raise TypeError if a non-string is passed in for the module name.
+        with self.assertRaises(TypeError):
+            util.import_(42)
+
+
+def test_main():
+    from test.support import run_unittest
+    run_unittest(APITest)
+
+
+if __name__ == '__main__':
+    test_main()
diff --git a/Lib/importlib/test/regrtest.py b/Lib/importlib/test/regrtest.py
index 17e7f4e..aedc338 100644
--- a/Lib/importlib/test/regrtest.py
+++ b/Lib/importlib/test/regrtest.py
@@ -6,7 +6,6 @@ Otherwise all command-line options valid for test.regrtest are also valid for
 this script.
 
 XXX FAILING
-    test_builtin  # Wanting a TypeError for an integer name
     test_import  # execution bit, exception name differing, file name differing
                     between code and module (?)
     test_importhooks  # package not set in _gcd_import() but level > 0