diff --git a/.github/workflows/test_on_push.yaml b/.github/workflows/test_on_push.yaml
index 775739a4..8bbcde1d 100644
--- a/.github/workflows/test_on_push.yaml
+++ b/.github/workflows/test_on_push.yaml
@@ -46,6 +46,7 @@ jobs:
             vshard-version: "0.1.41"
           - tarantool-version: "master"
             vshard-version: "master"
+            s3-upload: true
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
@@ -130,13 +131,33 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Run tests
-        if: matrix.coveralls != true # See https://github.com/actions/runner/issues/1173
+        if: >-
+          matrix.coveralls != true &&
+          (matrix.s3-upload != true ||
+            (github.ref_type != 'tag' && github.ref_name != 'master'))
         run: make -C build luatest-no-coverage
 
       - name: Run tests with coverage and send results to coveralls.io
         if: ${{ matrix.coveralls }}
         run: make -C build coveralls
 
+      - name: Run tests with coverage and generate report
+        if: matrix.s3-upload && (github.ref_type == 'tag' || github.ref_name == 'master')
+        run: make -C build coverage
+
+      - name: Upload coverage report to S3
+        if: matrix.s3-upload && (github.ref_type == 'tag' || github.ref_name == 'master')
+        uses: tarantool/actions/s3-upload-file@master
+        with:
+          access-key-id: ${{ secrets.COVERAGE_S3_ACCESS_KEY_ID }}
+          secret-access-key: ${{ secrets.COVERAGE_S3_SECRET_ACCESS_KEY }}
+          bucket: packages
+          source: luacov.report.out
+          destination: >-
+            tarantooldb/dev/coverage-reports/modules/crud/${{
+            github.ref_type == 'tag' && github.ref_name || 'master'
+            }}/luacov.report.out
+
   run-tests-ee:
     if: github.event_name == 'push'
     strategy:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e8ddefa1..d9326055 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,7 +60,8 @@ add_custom_target(coverage
 )
 
 if(DEFINED ENV{GITHUB_TOKEN})
-  set(COVERALLS_COMMAND ${LUACOVCOVERALLS} -v -r ${PROJECT_SOURCE_DIR} --repo-token $ENV{GITHUB_TOKEN})
+  set(COVERALLS_COMMAND ${LUACOVCOVERALLS} -o coveralls.json -v -r ${PROJECT_SOURCE_DIR}
+    --repo-token $ENV{GITHUB_TOKEN})
 else()
   set(COVERALLS_COMMAND ${CMAKE_COMMAND} -E echo "Skipped uploading to coveralls.io: no token.")
 endif()
diff --git a/deps.sh b/deps.sh
index 80ad017e..6e0dec42 100755
--- a/deps.sh
+++ b/deps.sh
@@ -16,6 +16,7 @@ fi
 # Test dependencies:
 ${TTCTL} rocks install luatest 1.0.1
 ${TTCTL} rocks install luacheck 0.26.0
+${TTCTL} rocks install luacov 0.13.0
 
 if [[ -n "${CARTRIDGE_VERSION}" ]]
 then