diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 515e2ca..699f477 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -24,9 +24,9 @@ jobs:
         with:
           rtools-version: none
       - run: julia -e 'using Pkg; Pkg.add("Revise")'
-      - run: go test -C go -v -timeout 300s -coverprofile=coverage.out -covermode=atomic
+      - shell: bash
+        run: go test -C go -v -coverprofile=coverage.out -covermode=atomic
       - name: Coverage summary
-        if: matrix.os == 'ubuntu-latest'
         shell: bash
         run: |
           {
@@ -36,3 +36,8 @@ jobs:
             echo '```'
           } >> "$GITHUB_STEP_SUMMARY"
           go tool cover -func=go/coverage.out | tail -n1
+      - uses: codecov/codecov-action@v7
+        if: matrix.os == 'ubuntu-latest'
+        with:
+          files: go/coverage.out
+          token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/README.md b/README.md
index 7b5b74c..7ff3f90 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # repld
 
+[![codecov](https://codecov.io/gh/Beforerr/repld/branch/main/graph/badge.svg)](https://codecov.io/gh/Beforerr/repld)
+
 Stateful and persistent REPL-like kernel for fast incremental iteration (Act → observe → adjust). CLI/agent-first design.
 
 ## Quickstart