diff --git a/.gitignore b/.gitignore
index d1403e9..e50e600 100644
--- a/.gitignore
+++ b/.gitignore
@@ -44,3 +44,5 @@
 /cryptography-36.0.0-vendor.tar.bz2
 /cryptography-36.0.1.tar.gz
 /cryptography-36.0.1-vendor.tar.bz2
+/artifacts
+/tests/artifacts
diff --git a/tests/tests.yml b/tests/tests.yml
index 115b5a9..f21d2cb 100644
--- a/tests/tests.yml
+++ b/tests/tests.yml
@@ -16,6 +16,7 @@
     - python3-pytest-subtests
     environment:
       PYTHONPATH: "{{ srcdir }}/vectors"
+      OPENSSL_ENABLE_SHA1_SIGNATURES: "yes"
     tests:
     - remove_hypothesis:
         # remove tests that depend on python3-hypothesis package