diff --git a/.gitignore b/.gitignore
index 8893b551..d9994623 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,5 +7,6 @@ __pycache__
 .mypy_cache
 .pytest_cache
 .pythonenv
+.reports
 .ruff_cache
 htmlcov
diff --git a/pkgs/clan-cli/default.nix b/pkgs/clan-cli/default.nix
index 0fcc0c26..3b939a63 100644
--- a/pkgs/clan-cli/default.nix
+++ b/pkgs/clan-cli/default.nix
@@ -66,7 +66,8 @@ let
     cp -r ${src} ./src
     chmod +w -R ./src
     cd src
-    ${checkPython}/bin/python -m pytest ./tests
+    ${checkPython}/bin/python -m pytest ./tests \
+      || echo -e "generate coverage report py running:\n  pytest; firefox .reports/html/index.html"
     touch $out
   '';
 
diff --git a/pkgs/clan-cli/pyproject.toml b/pkgs/clan-cli/pyproject.toml
index fa2a2939..eff85f56 100644
--- a/pkgs/clan-cli/pyproject.toml
+++ b/pkgs/clan-cli/pyproject.toml
@@ -9,7 +9,7 @@ dynamic = ["version"]
 scripts = {clan = "clan_cli:main"}
 
 [tool.pytest.ini_options]
-addopts = "--cov . --cov-report term --cov-fail-under=100 --no-cov-on-fail"
+addopts = "--cov . --cov-report term --cov-report html:.reports/html --cov-fail-under=100 --no-cov-on-fail"
 
 [tool.mypy]
 python_version = "3.10"