diff --git a/tests/test_litellm/test_cost_calculator.py b/tests/test_litellm/test_cost_calculator.py
index 293ca9ac398..ef4dc002b58 100644
--- a/tests/test_litellm/test_cost_calculator.py
+++ b/tests/test_litellm/test_cost_calculator.py
@@ -4785,3 +4785,13 @@ def test_cost_per_token_string_token_counts_coerced():
     )
     assert prompt_cost == expected_prompt
     assert completion_cost == expected_completion
+
+
+def test_cost_per_token_garbage_string_counts_cost_zero():
+    prompt_cost, completion_cost = cost_per_token(
+        model="gpt-4o-mini", prompt_tokens="abc", completion_tokens=5
+    )
+    expected_prompt, _ = cost_per_token(
+        model="gpt-4o-mini", prompt_tokens=0, completion_tokens=5
+    )
+    assert prompt_cost == expected_prompt