1 files changed, 28 insertions, 0 deletions
diff --git a/tests/test_leak.py b/tests/test_leak.py
new file mode 100644
index 0000000..55b10b9
--- /dev/null
+++ b/tests/test_leak.py
@@ -0,0 +1,28 @@
+import gc
+import platform
+
+import pytest
+
+from markupsafe import escape
+
+
+@pytest.mark.skipif(
+    escape.__module__ == "markupsafe._native",
+    reason="only test memory leak with speedups",
+)
+def test_markup_leaks():
+    counts = set()
+
+    for _i in range(20):
+        for _j in range(1000):
+            escape("foo")
+            escape("<foo>")
+            escape("foo")
+            escape("<foo>")
+
+        if platform.python_implementation() == "PyPy":
+            gc.collect()
+
+        counts.add(len(gc.get_objects()))
+
+    assert len(counts) == 1