Instead of running a python -c, use pytest_report_header to indicate OpenSSL version
diff --git a/tests/conftest.py b/tests/conftest.py
index bdd17fb..d872d7c 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -7,10 +7,14 @@
 import pytest
 
 from cryptography.hazmat.backends import _available_backends
+from cryptography.hazmat.backends.openssl import backend as openssl_backend
 
 from .utils import check_backend_support, select_backends, skip_if_empty
 
 
+def pytest_report_header(config):
+    return "OpenSSL: {}".format(openssl_backend.openssl_version_text())
+
 def pytest_generate_tests(metafunc):
     if "backend" in metafunc.fixturenames:
         names = metafunc.config.getoption("--backend")