diff --git a/.coveragerc b/.coveragerc
new file mode 100644
index 0000000000..4bb4e50c36
--- /dev/null
+++ b/.coveragerc
@@ -0,0 +1,3 @@
+[run]
+source = tinygrad
+branch = True
diff --git a/.gitignore b/.gitignore
index 4bca2e13dc..430e1b2692 100644
--- a/.gitignore
+++ b/.gitignore
@@ -63,3 +63,5 @@ profile_stats
 *.log
 target
 .mypy_cache
+mutants
+.mutmut-cache
\ No newline at end of file
diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000000..d10ab4ded6
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,21 @@
+[mutmut]
+paths_to_mutate=tinygrad
+do_not_mutate=
+  tinygrad/apps/*
+  tinygrad/codegen/*
+  tinygrad/engine/*
+  tinygrad/nn/*
+  tinygrad/renderer/*
+  tinygrad/runtime/*
+  tinygrad/schedule/*
+  tinygrad/uop/*
+  tinygrad/viz/*
+  tinygrad/device.py
+  tinygrad/dtype.py
+  tinygrad/gradient.py
+  tinygrad/helpers.py
+  tinygrad/tensor.py
+tests_dir=
+  test/test_tiny.py
+  test/test_ops.py
+debug=true