diff --git a/test/test_testing.py b/test/test_testing.py
index 7aebaa78e41..1c668f8476c 100644
--- a/test/test_testing.py
+++ b/test/test_testing.py
@@ -2240,6 +2240,17 @@ class TestImports(TestCase):
         out = self._check_python_output("import torch")
         self.assertEqual(out, "")
 
+    def test_not_import_sympy(self) -> None:
+        out = self._check_python_output("import torch;import sys;print('sympy' not in sys.modules)")
+        self.assertEqual(out.strip(), "True",
+                         "PyTorch should not depend on SymPy at import time as importing SymPy is *very* slow.\n"
+                         "See the beginning of the following blog post for how to profile and find which file is importing sympy:\n"
+                         "https://dev-discuss.pytorch.org/t/delving-into-what-happens-when-you-import-torch/1589\n\n"
+                         "If you hit this error, you may want to:\n"
+                         "  - Refactor your code to avoid depending on sympy files you may not need to depend\n"
+                         "  - Use TYPE_CHECKING if you are using sympy + strings if you are using sympy on type annotations\n"
+                         "  - Import things that depend on SymPy locally")
+
     @unittest.skipIf(IS_WINDOWS, "importing torch+CUDA on CPU results in warning")
     @parametrize('path', ['torch', 'functorch'])
     def test_no_mutate_global_logging_on_import(self, path) -> None: