diff --git a/pyproject.toml b/pyproject.toml
index b24f7dbb..06c8c616 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -85,7 +85,12 @@ module = ["boltons.*", "furo"]
 
 [tool.pytest.ini_options]
 # https://docs.pytest.org/en/latest/customize.html#pyproject-toml
-addopts = ["--durations=10", "--cov-report=term", "--cov-report=xml"]
+addopts = [
+    "--durations=10",
+    "--cov=extra_platforms",
+    "--cov-report=term",
+    "--cov-report=xml",
+]
 # Make sure tests that are expected to fail do not resurect and start working all of a sudden.
 xfail_strict = true