diff --git a/Lib/test/test_xdr.py b/Lib/test/test_xdr.py
new file mode 100644
index 00000000000..5d9a139b04b
--- /dev/null
+++ b/Lib/test/test_xdr.py
@@ -0,0 +1,24 @@
+import _xdr
+
+verbose = 0
+if __name__ == '__main__':
+    verbose = 1
+
+fd = 8.01
+s = _xdr.pack_float(fd)
+f = _xdr.unpack_float(s)
+
+if verbose:
+    print f
+if int(100*f) <> int(100*fd):
+    print 'pack_float() <> unpack_float()'
+
+fd = 9900000.9
+s = _xdr.pack_double(fd)
+f = _xdr.unpack_double(s)
+
+if verbose:
+    print f
+
+if int(100*f) <> int(100*fd):
+    print 'pack_double() <> unpack_double()'