diff --git a/CMakeLists.txt b/CMakeLists.txt
index cdd5ad80..958cde87 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -132,6 +132,13 @@ add_test(NAME highsnr_stdio_P_P_multi
                         python3 test_multimode_rx.py --framesperburst ${FRAMESPERBURST} --bursts ${BURSTS} --timeout 20")
         set_tests_properties(highsnr_stdio_P_P_multi PROPERTIES PASS_REGULAR_EXPRESSION "DATAC0: ${BURSTS}/${FRAMESPERBURST} DATAC1: ${BURSTS}/${FRAMESPERBURST} DATAC3: ${BURSTS}/${FRAMESPERBURST}")
 
+add_test(NAME tnc_state_machine
+         COMMAND sh -c "export LD_LIBRARY_PATH=${CODEC2_BUILD_DIR}/src;
+                        export PYTHONPATH=../tnc;
+                        cd ${CMAKE_CURRENT_SOURCE_DIR}/test;
+                        python3 test_tnc_states.py")
+         set_tests_properties(tnc_state_machine PROPERTIES PASS_REGULAR_EXPRESSION "errors: 0")
+
 # These tests can't run on GitHub actions as we don't have a virtual sound card
 if(NOT DEFINED ENV{GITHUB_RUN_ID})