diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f558e4c05..8feb59fdf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,7 +6,7 @@ on:
   pull_request:
     branches: [main]
 
-env: 
+env:
   CARGO_TERM_COLOR: always
   RUSTFLAGS: "-Dwarnings"
 
@@ -21,7 +21,7 @@ jobs:
           - nightly
     steps:
       - uses: actions/checkout@v3
-      
+
       - name: Init nigthly install for fmt
         run: rustup update nightly && rustup default nightly && rustup component add rustfmt
 
@@ -30,7 +30,7 @@ jobs:
 
       - name: Init install
         run: rustup update ${{ matrix.toolchain }} && rustup default ${{ matrix.toolchain }} && rustup component add clippy
-      
+
       - name: Clippy
         run: cargo clippy --all-targets --all-features
 
@@ -38,4 +38,32 @@ jobs:
         run: cargo build
 
       - name: Tests
-        run: cargo test
\ No newline at end of file
+        run: cargo test
+
+  coverage:
+    name: Zombienet SDK - coverage
+    needs: build
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+
+    permissions:
+       issues: write
+       pull-requests: write
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - 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: Collect coverage data
+        run: cargo llvm-cov nextest --lcov --output-path lcov.info
+
+      - name: Report code coverage
+        uses: Nef10/lcov-reporter-action@v0.4.0
+        with:
+          lcov-file: lcov.info
+          pr-number: ${{ github.event.pull_request.number }}
diff --git a/crates/configuration/src/network.rs b/crates/configuration/src/network.rs
index 5bef574bd..1bb022371 100644
--- a/crates/configuration/src/network.rs
+++ b/crates/configuration/src/network.rs
@@ -133,7 +133,7 @@ impl NetworkConfigBuilder<WithRelaychain> {
         match f(ParachainConfigBuilder::new()).build() {
             Ok(parachain) => Self::transition(
                 NetworkConfig {
-                    parachains: vec![self.config.parachains, vec![parachain]].concat(),
+                    parachains: [self.config.parachains, vec![parachain]].concat(),
                     ..self.config
                 },
                 self.errors,
@@ -152,7 +152,7 @@ impl NetworkConfigBuilder<WithRelaychain> {
 
         Self::transition(
             NetworkConfig {
-                hrmp_channels: vec![self.config.hrmp_channels, vec![new_hrmp_channel]].concat(),
+                hrmp_channels: [self.config.hrmp_channels, vec![new_hrmp_channel]].concat(),
                 ..self.config
             },
             self.errors,
diff --git a/crates/configuration/src/parachain.rs b/crates/configuration/src/parachain.rs
index a0254c909..84dc81f2c 100644
--- a/crates/configuration/src/parachain.rs
+++ b/crates/configuration/src/parachain.rs
@@ -480,7 +480,7 @@ impl ParachainConfigBuilder<WithAtLeastOneCollator> {
         match f(NodeConfigBuilder::new(ChainDefaultContext::default())).build() {
             Ok(collator) => Self::transition(
                 ParachainConfig {
-                    collators: vec![self.config.collators, vec![collator]].concat(),
+                    collators: [self.config.collators, vec![collator]].concat(),
                     ..self.config
                 },
                 self.errors,
diff --git a/crates/configuration/src/relaychain.rs b/crates/configuration/src/relaychain.rs
index 8bffcff9f..ad437f296 100644
--- a/crates/configuration/src/relaychain.rs
+++ b/crates/configuration/src/relaychain.rs
@@ -317,7 +317,7 @@ impl RelaychainConfigBuilder<WithAtLeastOneNode> {
         match f(NodeConfigBuilder::new(self.default_context())).build() {
             Ok(node) => Self::transition(
                 RelaychainConfig {
-                    nodes: vec![self.config.nodes, vec![node]].concat(),
+                    nodes: [self.config.nodes, vec![node]].concat(),
                     ..self.config
                 },
                 self.errors,