diff --git a/tests/utils/constraints.txt b/tests/utils/constraints.txt
index 47b3907b8d..57861087ac 100644
--- a/tests/utils/constraints.txt
+++ b/tests/utils/constraints.txt
@@ -51,6 +51,7 @@ redis < 4.0.0 ; python_version >= '2.7' and python_version < '3.6'
 redis ; python_version >= '3.6'
 pycdlib < 1.13.0 ; python_version < '3'  # 1.13.0 does not work with Python 2, while not declaring that
 python-daemon <= 2.3.0 ; python_version < '3'
+bcrypt < 4.0.0  # TEMP: restrict to < 4.0.0 since installing 4.0.0 fails on RHEL 8
 
 # freeze pylint and its requirements for consistent test results
 astroid == 2.2.5