diff --git a/.config/nextest.toml b/.config/nextest.toml
index 9e9c5b857..0529a1244 100644
--- a/.config/nextest.toml
+++ b/.config/nextest.toml
@@ -1,3 +1,6 @@
 [profile.default]
 slow-timeout = { period = "120s", terminate-after = 1 }
-retries = 3 # for flaky tests
+retries = 3                                             # for flaky tests
+
+[profile.integration]
+slow-timeout = { period = "3600s", terminate-after = 1 }
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bcbc7e686..1a0f13471 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -81,36 +81,31 @@ jobs:
   integration-test:
     name: Integration Test Suite
     runs-on: [self-hosted, linux]
-    needs: test
+    needs: rustfmt
     steps:
       - uses: actions/checkout@v3
       - name: Install Clang
         run: sudo apt-get update && sudo apt-get install -y clang
       - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: llvm-tools-preview
+      - uses: taiki-e/install-action@cargo-llvm-cov
+      - uses: taiki-e/install-action@nextest
       - uses: Swatinem/rust-cache@v2
         with:
           cache-on-failure: true
       - uses: extractions/setup-just@v2
-      - name: Run integration tests
+      - name: Run integration tests with coverage
         env:
           RUST_LOG: warn
-        run: just run_integration_tests
-
-  cli-builds:
-    name: tycho-cli check
-    runs-on: [self-hosted, linux]
-    needs: rustfmt
-    steps:
-      - uses: actions/checkout@v3
-      - name: Install Clang
-        run: sudo apt-get update && sudo apt-get install -y clang
-      - uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
+        run: just run_integration_tests_cov
+      - name: Upload integration test coverage to Codecov
+        uses: codecov/codecov-action@v3
+        if: github.repository == 'broxus/tycho'
         with:
-          cache-on-failure: true
-      - uses: extractions/setup-just@v2
-      - name: Build CLI
-        run: just build
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: integration_codecov.json
+          fail_ci_if_error: true
 
   metrics:
     name: Metrics
diff --git a/justfile b/justfile
index 188271e75..96b8afa70 100644
--- a/justfile
+++ b/justfile
@@ -79,7 +79,31 @@ update_rpc_proto:
     cargo run -p tycho-gen-protos
 
 # === Integration tests stuff ===
+run_integration_tests_cov: prepare_integration_tests
+    #!/usr/bin/env bash
+    set -euo pipefail
+    export INTEGRATION_TEST=1
 
+    if [ -n "${CI:-}" ]; then
+        # Running in CI
+        RUST_BACKTRACE=1 cargo llvm-cov nextest \
+            --package tycho-core \
+            --profile integration \
+            --cargo-profile release_check \
+            --test archives heavy_archives \
+            --run-ignored all \
+            --output-path integration_codecov.json \
+            --codecov
+    else
+        # Running locally - show coverage report in browser
+        RUST_BACKTRACE=1 cargo llvm-cov nextest \
+            --package tycho-core \
+            --profile integration \
+            --cargo-profile release_check \
+            --test archives heavy_archives \
+            --run-ignored all \
+            --open
+    fi
 # Runs all tests including ignored. Will take a lot of time to run.
 run_integration_tests: prepare_integration_tests
     ./scripts/run-integration-tests.sh
diff --git a/scripts/common.sh b/scripts/common.sh
old mode 100644
new mode 100755
diff --git a/scripts/coverage.py b/scripts/coverage.py
index 7fdc5abe4..f84bd7194 100755
--- a/scripts/coverage.py
+++ b/scripts/coverage.py
@@ -2,18 +2,42 @@
 import os
 import sys
 
+def should_collect_coverage(crate_name: str) -> bool:
+    """
+    Determines if coverage should be collected for a crate.
 
-blacklist = ["25519", "tokio"]
+    Logic:
+    - In integration tests: only collect for tycho-* crates
+    - Otherwise: collect for everything except blacklisted crates
+    """
+    # Default blacklist
+    ALWAYS_BLACKLISTED = {"25519", "tokio"}
 
+    # Integration test mode
+    if os.environ.get("INTEGRATION_TEST"):
+        return "tycho" in crate_name
+
+    # Normal mode
+    return crate_name not in ALWAYS_BLACKLISTED
+
+def get_crate_name(args):
+    """Extract crate name from rustc arguments"""
+    for i, arg in enumerate(args):
+        if arg == "--crate-name":
+            return args[i + 1]
+    return ""
 
 def main():
     # The first argument is the path to rustc, followed by its arguments
     args = sys.argv[1:]
 
-    # coverage is necessary only for our project
+    # Get crate name
     crate_name = get_crate_name(args)
-    if any(crate in crate_name for crate in blacklist):
+
+    # Check if we should collect coverage
+    if not should_collect_coverage(crate_name):
         try:
+            # Remove coverage instrumentation flags
             instrument_coverage_index = args.index("instrument-coverage")
             del args[instrument_coverage_index]
             del args[instrument_coverage_index - 1]
@@ -23,17 +47,5 @@ def main():
     # Execute rustc with the potentially modified arguments
     os.execvp(args[0], args)
 
-
-def get_crate_name(args):
-    for i, arg in enumerate(args):
-        if arg == "--crate-name":
-            return args[i + 1]
-    return ""
-
-
-def eprint(*args, **kwargs):
-    print(*args, file=sys.stderr, **kwargs)
-
-
 if __name__ == "__main__":
     main()