diff --git a/.gitignore b/.gitignore
index 61616f78..87b75569 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,7 +5,7 @@ src/seedsigner.egg-info/
 .vscode
 src/seedsigner/models/settings_definition.json
 .idea
-.coverage
+.coverage*
 seedsigner-screenshots
 
 *.po
diff --git a/pyproject.toml b/pyproject.toml
index 536700e2..01f60cfc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,6 +55,7 @@ skip_empty = true
 
 [tool.coverage.run]
 branch = true
+parallel = true
 
 [tool.pytest.ini_options]
 testpaths = ["tests"]
diff --git a/tests/README.md b/tests/README.md
index 12f321d3..686c7b86 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -45,18 +45,36 @@ Annoying complications:
 * Better idea: use a proper logger in the test file and use one of the above options to display logs
 
 
-### Test Coverage
+## Screenshot generator
+The screenshot generator is meant to mostly be a utility and not really part of the test suite. However,
+it is actually implemented to be run by `pytest`.
+
+see: [Screenshot generator README](screenshot_generator/README.md)
+
+
+## Test Coverage
 Run tests and generate test coverage
-```
+```bash
 coverage run -m pytest
 ```
 
-Show the resulting test coverage details:
+The screenshots have to be run separately, but they can also add to overall coverage:
+
+```bash
+coverage run -m pytest tests/screenshot_generator/generator.py --locale es
 ```
+
+Each run creates its own `.coverage.*` results file. Merge them into one result with:
+```bash
+coverage combine
+```
+
+Show the resulting test coverage details:
+```bash
 coverage report
 ```
 
 Generate the html overview:
-```
+```bash
 coverage html
 ```
diff --git a/tests/screenshot_generator/README.md b/tests/screenshot_generator/README.md
index 092a13b9..123c8e52 100644
--- a/tests/screenshot_generator/README.md
+++ b/tests/screenshot_generator/README.md
@@ -11,7 +11,8 @@ pytest tests/screenshot_generator/generator.py
 
 You can also run a `coverage` report to see exactly what the screenshots are and are not hitting:
 ```bash
-coverage run -m pytest tests/screenshot_generator/generator.py --locale es && coverage report
+coverage erase
+coverage run -m pytest tests/screenshot_generator/generator.py --locale es && coverage combine && coverage report
 
 # Generate the interactive html report
 coverage html