diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yaml
similarity index 82%
rename from .github/workflows/ci.yml
rename to .github/workflows/ci.yaml
index 7c493625d..b3e1303d8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yaml
@@ -6,26 +6,6 @@ on:
 
 name: ci
 jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout sources
-        uses: actions/checkout@v3
-      - name: Install protobuf
-        run: sudo apt-get install -y protobuf-compiler
-      - name: Install toolchain
-        uses: dtolnay/rust-toolchain@stable
-        with:
-          toolchain: 1.71.0
-      - uses: Swatinem/rust-cache@v2
-        with:
-          cache-on-failure: true
-      - name: Install Foundry
-        uses: foundry-rs/foundry-toolchain@v1
-
-      - name: Run tests
-        run: cargo test --all --all-features
-
   lint:
     runs-on: ubuntu-latest
     steps:
diff --git a/.github/workflows/codecov.yaml b/.github/workflows/codecov.yaml
new file mode 100644
index 000000000..aa7b9fc7c
--- /dev/null
+++ b/.github/workflows/codecov.yaml
@@ -0,0 +1,54 @@
+coverage:
+  status:
+    patch: off
+    project:
+      default:
+        threshold: null
+        informational: true
+github_checks:
+  annotations: false
+comment:
+  layout: "reach, files, flags, components"
+  require_changes: true
+component_management:
+  individual_components:
+    - component_id: rundler_binary
+      name: rundler binary
+      paths:
+        - bin/**
+    - component_id: builder
+      name: builder
+      paths:
+        - crates/builder/**
+    - component_id: dev
+      name: dev
+      paths:
+        - crates/dev/**
+    - component_id: pool
+      name: pool
+      paths:
+        - crates/pool/**
+    - component_id: provider
+      name: provider
+      paths:
+        - crates/provider/**
+    - component_id: rpc
+      name: rpc
+      paths:
+        - crates/rpc/**
+    - component_id: sim
+      name: sim
+      paths:
+        - crates/sim/**
+    - component_id: tasks
+      name: tasks
+      paths:
+        - crates/tasks/**
+    - component_id: types
+      name: types
+      paths:
+        - crates/types/**
+    - component_id: utils
+      name: utils
+      paths:
+        - crates/utils/**
diff --git a/.github/workflows/unit.yaml b/.github/workflows/unit.yaml
new file mode 100644
index 000000000..07678954b
--- /dev/null
+++ b/.github/workflows/unit.yaml
@@ -0,0 +1,52 @@
+on:
+  pull_request:
+  merge_group:
+  push:
+    branches: [main]
+
+env:
+  CARGO_TERM_COLOR: always
+
+name: unit
+jobs:
+  test:
+    name: unit-tests
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+
+      - name: Install toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: llvm-tools-preview
+
+      - name: Install protobuf
+        run: sudo apt-get install -y protobuf-compiler
+
+      - uses: Swatinem/rust-cache@v2
+        with:
+          cache-on-failure: true
+
+      - name: Install Foundry
+        uses: foundry-rs/foundry-toolchain@v1
+
+      - name: Install latest nextest release
+        uses: taiki-e/install-action@nextest
+
+      - name: Install cargo-llvm-cov
+        uses: taiki-e/install-action@cargo-llvm-cov
+
+      - name: Run tests
+        run: |
+          cargo llvm-cov nextest --lcov --output-path lcov.info \
+            --locked --all-features --workspace
+
+      - name: Upload coverage data to codecov
+        uses: codecov/codecov-action@v3
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: lcov.info
+          flags: unit-tests
+