diff --git a/tests/test_configs.py b/tests/test_configs.py
new file mode 100644
index 0000000..7d5c0c1
--- /dev/null
+++ b/tests/test_configs.py
@@ -0,0 +1,6 @@
+from amodem import config
+
+
+def test_bitrates():
+    for rate, cfg in sorted(config.bitrates.items()):
+        assert rate * 1000 == cfg.modem_bps