diff --git a/.github/codecov.yml b/.github/codecov.yml
new file mode 100644
index 00000000..e9b99c82
--- /dev/null
+++ b/.github/codecov.yml
@@ -0,0 +1,15 @@
+coverage:
+  status:
+    project:
+      default:
+        target: 100
+        threshold: 0.1
+    patch:
+      default:
+        target: 100
+comment:
+  layout: "diff, files"
+  behavior: default
+  require_changes: true  # if true: only post the comment if coverage changes
+  branches:               # branch names that can post comment
+    - "main"
diff --git a/docs/release.rst b/docs/release.rst
index 01d7a0a8..b9a18930 100644
--- a/docs/release.rst
+++ b/docs/release.rst
@@ -59,7 +59,8 @@ Maintenance
   By :user:`John Kirkham <jakirkham>`, :issue:`383`.
 
 * Collect coverage on all OSes & enable Codecov.
-  By :user:`John Kirkham <jakirkham>`, :issue:`386`, :issue:`388`.
+  By :user:`John Kirkham <jakirkham>`, :issue:`386`, :issue:`388`,
+  :issue:`390`, :issue:`391`.
 
 .. _release_0.10.2: