gistfile1.diff

diff --git a/sympy/physics/vector/tests/test_frame.py b/sympy/physics/vector/tests/test_frame.py
index b1a55d2..3c3af2c 100644
--- a/sympy/physics/vector/tests/test_frame.py
+++ b/sympy/physics/vector/tests/test_frame.py
@@ -7,6 +7,13 @@
 A = ReferenceFrame('A')
 
 
+def test_simple_caching():
+    A1 = ReferenceFrame('A')
+    A2 = ReferenceFrame('A')
+    assert CoordinateSym('Ax', A1, 0) == A1[0]
+    assert CoordinateSym('Ax', A2, 0) == A2[0]
+
+
 def test_coordinate_vars():
     """Tests the coordinate variables functionality"""
     assert CoordinateSym('Ax', A, 0) == A[0]