diff --git a/python-orjson.spec b/python-orjson.spec
index 24dc797..e2e0d7d 100644
--- a/python-orjson.spec
+++ b/python-orjson.spec
@@ -19,6 +19,11 @@ Source:         %{pypi_source orjson}
 BuildRequires:  tomcli
 BuildRequires:  python3-devel
 BuildRequires:  %{py3_dist pytest-forked}
+# Upstream restricts these test dependencies to particular Python interpreter
+# versions and architectures, but we would like to run the corresponding tests
+# everywhere.
+BuildRequires:  %{py3_dist numpy}
+BuildRequires:  %{py3_dist pendulum}
 BuildRequires:  rust-packaging