diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6fa6725..236a947 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,64 +1,46 @@
 name: "Rust checks"
-
 on:
   pull_request:
-    branches: [ main ]
-
+    branches: [main]
 permissions:
   contents: read
   actions: read
-
+env:
+  RUSTFLAGS: "-D warnings" # Make all warnings deny.
 jobs:
   check:
     # Target self-hosted runner by label
-    runs-on: [ nixos ]
-
+    runs-on: [nixos]
     # SECURITY: Require manual approval for external PRs
     if: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository }}
-
     steps:
       - name: checkout-code
         uses: actions/checkout@v4
-
       - name: cargo-check
-        env:
-          RUSTFLAGS: "-D warnings" # Make all warnings deny.
         run: nix develop --command cargo check
-
       - name: cargo-test
-        env:
-          RUSTFLAGS: "-D warnings" # Make all warnings deny.
         run: nix develop --command cargo test
-
-      # TODO: make clippy work
-      # - name: cargo-clippy
-      #   env:
-      #     RUSTFLAGS: "-D warnings" # Make all warnings deny.
-      #   run: nix develop --command cargo clippy
-
+      # - name: cargo-test
+      #   run: nix develop --command cargo test --release
+      - name: cargo-clippy
+        run: nix develop --command cargo clippy
       - name: cargo-bench
         run: nix develop --command cargo bench --no-run # Just to make sure it compiles
-
       - name: cargo-fmt
         run: nix develop --command cargo fmt --check
-
       - name: cargo-doc
         run: nix develop --command cargo doc
-
       - name: nix-flake-check
         run: nix flake check
-
       - name: nix-deadnix
         run: nix develop --command deadnix
-
       - name: nix-statix
         run: nix develop --command statix check
-
       - name: nix-alejandra
         run: nix develop --command alejandra --check .
+      - name: yamlfmt
+        run: nix develop --command yamlfmt -lint .
 
-      # TODO: enable hongdown
-      # - name: markdown-formatting
-      #   run: nix develop --command hongdown --check .
-      
-
+# TODO: enable hongdown
+# - name: markdown-formatting
+#   run: nix develop --command hongdown --check .
diff --git a/clippy.toml b/clippy.toml
index ee4f0ba..41eab6d 100644
--- a/clippy.toml
+++ b/clippy.toml
@@ -1,3 +1,4 @@
+allow-unwrap-in-tests = true
 disallowed-methods = [
   # Call `Vec::push_within_capacity` instead as it avoid the footgun of allocations in hot-paths.
   "std::vec::Vec::push",
diff --git a/flake.nix b/flake.nix
index ba4940d..dc69fa6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -73,6 +73,7 @@
         tools = with pkgs; [
           mprocs # Run multiple commands in parallel from `mprocs.yml`, acting essentially as a local CI system.
           hongdown.packages.${system}.hongdown
+          yamlfmt
         ];
       in
         with pkgs; {
diff --git a/mprocs.yaml b/mprocs.yaml
index 7b10a3c..2a71d74 100644
--- a/mprocs.yaml
+++ b/mprocs.yaml
@@ -3,20 +3,17 @@ procs:
     shell: "cargo check"
   cargo-check-trade_aggregation:
     shell: "cargo check --features trade_aggregation"
-
   # Testing
   cargo-test:
     shell: "cargo test"
   cargo-test-trade_aggregation:
     shell: "cargo test --features trade_aggregation"
-
   cargo-clippy:
     shell: "cargo clippy"
   cargo-doc:
     shell: "cargo doc"
   cargo-machete:
     shell: "cargo machete"
-
   # Benchmarking
   cargo-bench_Position:
     shell: "cargo bench Position"
@@ -60,7 +57,6 @@ procs:
   cargo-bench_OrderBook/try_insert:
     shell: "cargo bench OrderBook/try_insert"
     autostart: false
-
   # Formatting
   taplo:
     shell: "taplo fmt"
@@ -68,7 +64,6 @@ procs:
     shell: "cargo fmt"
   hongdown:
     shell: "hongdown -w ."
-
   # Code Coverage
   cargo-tarpaulin:
     shell: "cargo tarpaulin --target-dir target/tarpaulin"
@@ -76,7 +71,6 @@ procs:
   cargo-mutants:
     shell: "cargo mutants"
     autostart: false
-
   # Security
   cargo-audit:
     shell: "cargo audit"
@@ -84,10 +78,8 @@ procs:
   cargo-miri:
     shell: "MIRIFLAGS=-Zmiri-disable-isolation cargo miri nextest run -j 4"
     autostart: false
-
   # Semantic version check
   semver-checks:
     shell: "cargo semver-checks"
-
   basic-example:
     shell: "cargo run --example basic"