diff --git a/python-requirements.txt b/python-requirements.txt
index d15022f..a4b7816 100644
--- a/python-requirements.txt
+++ b/python-requirements.txt
@@ -17,6 +17,9 @@
 sortedcontainers
 hypothesis
 
+# Robot test framework for FPGA tests
+pyserial
+
 # camkes-deps
 
 hjson