-BuildRequires: python-mock
-BuildRequires: python-nose
-BuildRequires: python-tornado
+BuildRequires: python-cryptography >= 2.8
+BuildRequires: python-dateutil >= 2.8.1
+BuildRequires: python-flaky >= 3.6.1
+# TODO
+#BuildRequires: python-gcp_devrel-py-tools >= 0.0.15
+BuildRequires: python-mock >= 3.0.5
+BuildRequires: python-pytest >= 4.6.9
+BuildRequires: python-pytest-freezegun >= 0.3.0
+BuildRequires: python-pytest-timeout >= 1.3.4
+BuildRequires: python-tornado >= 5.1.1
+BuildRequires: python-trustme >= 0.5.3