tests: disable cachew in my.tests subpackage

my/tests/conftest.py

@@ -0,0 +1,8 @@
+import pytest
+
+# I guess makes sense by default
+@pytest.fixture(autouse=True)
+def without_cachew():
+    from my.core.cachew import disabled_cachew
+    with disabled_cachew():
+        yield