diff --git a/awscli2.spec b/awscli2.spec
index af5ed62..c21b80e 100644
--- a/awscli2.spec
+++ b/awscli2.spec
@@ -104,6 +104,9 @@ sed -i '/self.driver.start(env=env)/i \ \ \ \ \ \ \ \ env["PYTHONPATH"] = "%{bui
     tests/utils/botocore/__init__.py
 
 export TESTS_REMOVE_REPO_ROOT_FROM_PATH=1 TZ=UTC
+%if 0%{?rhel}
+export OPENSSL_ENABLE_SHA1_SIGNATURES=yes
+%endif
 %pytest --verbose --numprocesses=auto --dist=loadfile tests/unit tests/functional