diff --git a/.github/codecov.yml b/.github/codecov.yml
new file mode 100644
index 0000000..cd5a65a
--- /dev/null
+++ b/.github/codecov.yml
@@ -0,0 +1,4 @@
+coverage:
+  ignore:
+    - "cmd/plan9asm"
+    - "cmd/plan9asmll"