diff --git a/tests/test_traces.py b/tests/test_traces.py
new file mode 100644
index 0000000..c0b7978
--- /dev/null
+++ b/tests/test_traces.py
@@ -0,0 +1,14 @@
+from mev_inspect.traces import is_child_trace_address
+
+
+def test_is_child_trace_address():
+    assert is_child_trace_address([0], [])
+    assert is_child_trace_address([0, 0], [])
+    assert is_child_trace_address([0, 0], [0])
+    assert is_child_trace_address([100, 1, 10], [100])
+    assert is_child_trace_address([100, 1, 10], [100, 1])
+
+    assert not is_child_trace_address([0], [1])
+    assert not is_child_trace_address([1], [0])
+    assert not is_child_trace_address([1, 0], [0])
+    assert not is_child_trace_address([100, 2, 10], [100, 1])