tests: automatically unset PKG_CONFIG_PATH before running tests

Signed-off-by: Filipe Laíns <lains@riseup.net>

Author: FFY00

tests/conftest.py

@@ -46,6 +46,11 @@ def env(tmpdir, self_wheel):
     return env
 
 
+@pytest.fixture(autouse=True)
+def unset_pkg_config_path(monkeypatch):
+    monkeypatch.delenv('PKG_CONFIG_PATH', raising=False)
+
+
 @pytest.fixture(autouse=True)
 def reset_recursive_flag():
     yield