diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d7604cf33..72f99513d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,5 +1,6 @@
 stages:
   - build
+  - test
 variables:
   GIT_DEPTH: "3"
   SIMPLECOV: "true"
@@ -9,399 +10,16 @@ variables:
 cache:
   key: "$CI_BUILD_NAME/$CI_BUILD_REF_NAME"
   untracked: true
-linux-stable:
-  stage: build
-  image: ethcore/rust:stable
-  only:
-    - master
-    - beta
-    - tags
-    - stable
-  script:
-    - cargo build --release $CARGOFLAGS
-    - strip target/release/parity
-    - md5sum target/release/parity >> parity.md5
-    - sh scripts/deb-build.sh amd64
-    - cp target/release/parity deb/usr/bin/parity
-    - export VER=$(grep -m 1 version Cargo.toml | awk '{print $3}' | tr -d '"' | tr -d "\n")
-    - dpkg-deb -b deb "parity_"$VER"_amd64.deb"
-    - md5sum "parity_"$VER"_amd64.deb" >> "parity_"$VER"_amd64.deb.md5"
-    - aws configure set aws_access_key_id $s3_key
-    - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/parity --body target/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/parity.md5 --body parity.md5
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/"parity_"$VER"_amd64.deb" --body "parity_"$VER"_amd64.deb"
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-linux-gnu/"parity_"$VER"_amd64.deb.md5" --body "parity_"$VER"_amd64.deb.md5"
-  tags:
-    - rust
-    - rust-stable
-  artifacts:
-    paths:
-    - target/release/parity
-    name: "stable-x86_64-unknown-linux-gnu_parity"
-linux-stable-14.04:
-  stage: build
-  image: ethcore/rust-14.04:latest
-  only:
-    - master
-    - beta
-    - tags
-    - stable
-  script:
-    - cargo build --release $CARGOFLAGS
-    - strip target/release/parity
-    - md5sum target/release/parity >> parity.md5
-    - sh scripts/deb-build.sh amd64
-    - cp target/release/parity deb/usr/bin/parity
-    - export VER=$(grep -m 1 version Cargo.toml | awk '{print $3}' | tr -d '"' | tr -d "\n")
-    - dpkg-deb -b deb "parity_"$VER"_amd64.deb"
-    - md5sum "parity_"$VER"_amd64.deb" >> "parity_"$VER"_amd64.deb.md5"
-    - aws configure set aws_access_key_id $s3_key
-    - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-ubuntu_14_04-gnu/parity --body target/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-ubuntu_14_04-gnu/parity.md5 --body parity.md5
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-ubuntu_14_04-gnu/"parity_"$VER"_amd64.deb" --body "parity_"$VER"_amd64.deb"
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-ubuntu_14_04-gnu/"parity_"$VER"_amd64.deb.md5" --body "parity_"$VER"_amd64.deb.md5"
-  tags:
-    - rust
-    - rust-14.04
-  artifacts:
-    paths:
-    - target/release/parity
-    name: "stable-x86_64-unknown-ubuntu_14_04-gnu_parity"
-linux-beta:
-  stage: build
-  image: ethcore/rust:beta
-  only:
-    - master
-    - beta
-    - tags
-    - stable
-  script:
-    - cargo build --release $CARGOFLAGS
-    - strip target/release/parity
-  tags:
-    - rust
-    - rust-beta
-  artifacts:
-    paths:
-    - target/release/parity
-    name: "beta-x86_64-unknown-linux-gnu_parity"
-  allow_failure: true
-linux-nightly:
-  stage: build
-  image: ethcore/rust:nightly
-  only:
-    - master
-    - beta
-    - tags
-    - stable
-  script:
-    - cargo build --release $CARGOFLAGS
-    - strip target/release/parity
-  tags:
-    - rust
-    - rust-nightly
-  artifacts:
-    paths:
-    - target/release/parity
-    name: "nigthly-x86_64-unknown-linux-gnu_parity"
-  allow_failure: true
-linux-centos:
-  stage: build
-  image: ethcore/rust-centos:latest
-  only:
-    - master
-    - beta
-    - tags
-    - stable
-  script:
-    - export CXX="g++"
-    - export CC="gcc"
-    - cargo build --release $CARGOFLAGS
-    - strip target/release/parity
-    - md5sum target/release/parity >> parity.md5
-    - aws configure set aws_access_key_id $s3_key
-    - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-centos-gnu/parity --body target/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-unknown-centos-gnu/parity.md5 --body parity.md5
-  tags:
-    - rust
-    - rust-centos
-  artifacts:
-    paths:
-    - target/release/parity
-    name: "x86_64-unknown-centos-gnu_parity"
-linux-armv7:
-  stage: build
-  image: ethcore/rust-armv7:latest
-  only:
-    - beta
-    - tags
-    - stable
-  script:
-    - export CC=arm-linux-gnueabihf-gcc
-    - export CXX=arm-linux-gnueabihf-g++
-    - export HOST_CC=gcc
-    - export HOST_CXX=g++
-    - rm -rf .cargo
-    - mkdir -p .cargo
-    - echo "[target.armv7-unknown-linux-gnueabihf]" >> .cargo/config
-    - echo "linker= \"arm-linux-gnueabihf-gcc\"" >> .cargo/config
-    - cat .cargo/config
-    - cargo build --target armv7-unknown-linux-gnueabihf --release $CARGOFLAGS
-    - arm-linux-gnueabihf-strip target/armv7-unknown-linux-gnueabihf/release/parity
-    - md5sum target/armv7-unknown-linux-gnueabihf/release/parity >> parity.md5
-    - sh scripts/deb-build.sh armhf
-    - cp target/armv7-unknown-linux-gnueabihf/release/parity deb/usr/bin/parity
-    - export VER=$(grep -m 1 version Cargo.toml | awk '{print $3}' | tr -d '"' | tr -d "\n")
-    - dpkg-deb -b deb "parity_"$VER"_armhf.deb"
-    - md5sum "parity_"$VER"_armhf.deb" >> "parity_"$VER"_armhf.deb.md5"
-    - aws configure set aws_access_key_id $s3_key
-    - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/parity --body target/armv7-unknown-linux-gnueabihf/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/parity.md5 --body parity.md5
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/"parity_"$VER"_armhf.deb" --body "parity_"$VER"_armhf.deb"
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/armv7-unknown-linux-gnueabihf/"parity_"$VER"_armhf.deb.md5" --body "parity_"$VER"_armhf.deb.md5"
-  tags:
-    - rust
-    - rust-arm
-  artifacts:
-    paths:
-    - target/armv7-unknown-linux-gnueabihf/release/parity
-    name: "armv7_unknown_linux_gnueabihf_parity"
-  allow_failure: true
-linux-arm:
-  stage: build
-  image: ethcore/rust-arm:latest
-  only:
-    - beta
-    - tags
-    - stable
-  script:
-    - export CC=arm-linux-gnueabihf-gcc
-    - export CXX=arm-linux-gnueabihf-g++
-    - export HOST_CC=gcc
-    - export HOST_CXX=g++
-    - rm -rf .cargo
-    - mkdir -p .cargo
-    - echo "[target.arm-unknown-linux-gnueabihf]" >> .cargo/config
-    - echo "linker= \"arm-linux-gnueabihf-gcc\"" >> .cargo/config
-    - cat .cargo/config
-    - cargo build --target arm-unknown-linux-gnueabihf --release $CARGOFLAGS
-    - arm-linux-gnueabihf-strip target/arm-unknown-linux-gnueabihf/release/parity
-    - md5sum target/arm-unknown-linux-gnueabihf/release/parity >> parity.md5
-    - sh scripts/deb-build.sh armhf
-    - cp target/arm-unknown-linux-gnueabihf/release/parity deb/usr/bin/parity
-    - export VER=$(grep -m 1 version Cargo.toml | awk '{print $3}' | tr -d '"' | tr -d "\n")
-    - dpkg-deb -b deb "parity_"$VER"_armhf.deb"
-    - md5sum "parity_"$VER"_armhf.deb" >> "parity_"$VER"_armhf.deb.md5"
-    - aws configure set aws_access_key_id $s3_key
-    - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/parity --body target/arm-unknown-linux-gnueabihf/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/parity.md5 --body parity.md5
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/"parity_"$VER"_armhf.deb" --body "parity_"$VER"_armhf.deb"
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabihf/"parity_"$VER"_armhf.deb.md5" --body "parity_"$VER"_armhf.deb.md5"
-  tags:
-    - rust
-    - rust-arm
-  artifacts:
-    paths:
-    - target/arm-unknown-linux-gnueabihf/release/parity
-    name: "arm-unknown-linux-gnueabihf_parity"
-  allow_failure: true
-linux-armv6:
-  stage: build
-  image: ethcore/rust-armv6:latest
-  only:
-    - beta
-    - tags
-    - stable
-  script:
-    - export CC=arm-linux-gnueabi-gcc
-    - export CXX=arm-linux-gnueabi-g++
-    - export HOST_CC=gcc
-    - export HOST_CXX=g++
-    - rm -rf .cargo
-    - mkdir -p .cargo
-    - echo "[target.arm-unknown-linux-gnueabi]" >> .cargo/config
-    - echo "linker= \"arm-linux-gnueabi-gcc\"" >> .cargo/config
-    - cat .cargo/config
-    - cargo build --target arm-unknown-linux-gnueabi --release $CARGOFLAGS
-    - arm-linux-gnueabi-strip target/arm-unknown-linux-gnueabi/release/parity
-    - md5sum target/arm-unknown-linux-gnueabi/release/parity >> parity.md5
-    - aws configure set aws_access_key_id $s3_key
-    - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabi/parity --body target/arm-unknown-linux-gnueabi/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/arm-unknown-linux-gnueabi/parity.md5 --body parity.md5
-  tags:
-    - rust
-    - rust-arm
-  artifacts:
-    paths:
-    - target/arm-unknown-linux-gnueabi/release/parity
-    name: "arm-unknown-linux-gnueabi_parity"
-  allow_failure: true
-linux-aarch64:
-  stage: build
-  image: ethcore/rust-aarch64:latest
-  only:
-    - beta
-    - tags
-    - stable
-  script:
-    - export CC=aarch64-linux-gnu-gcc
-    - export CXX=aarch64-linux-gnu-g++
-    - export HOST_CC=gcc
-    - export HOST_CXX=g++
-    - rm -rf .cargo
-    - mkdir -p .cargo
-    - echo "[target.aarch64-unknown-linux-gnu]" >> .cargo/config
-    - echo "linker= \"aarch64-linux-gnu-gcc\"" >> .cargo/config
-    - cat .cargo/config
-    - cargo build --target aarch64-unknown-linux-gnu --release $CARGOFLAGS
-    - aarch64-linux-gnu-strip target/aarch64-unknown-linux-gnu/release/parity
-    - md5sum target/aarch64-unknown-linux-gnu/release/parity >> parity.md5
-    - sh scripts/deb-build.sh arm64
-    - cp target/aarch64-unknown-linux-gnu/release/parity deb/usr/bin/parity
-    - export VER=$(grep -m 1 version Cargo.toml | awk '{print $3}' | tr -d '"' | tr -d "\n")
-    - dpkg-deb -b deb "parity_"$VER"_arm64.deb"
-    - md5sum "parity_"$VER"_arm64.deb" >> "parity_"$VER"_arm64.deb.md5"
-    - aws configure set aws_access_key_id $s3_key
-    - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/parity --body target/aarch64-unknown-linux-gnu/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/parity.md5 --body parity.md5
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/"parity_"$VER"_arm64.deb" --body "parity_"$VER"_arm64.deb"
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/aarch64-unknown-linux-gnu/"parity_"$VER"_arm64.deb.md5" --body "parity_"$VER"_arm64.deb.md5"
-  tags:
-    - rust
-    - rust-arm
-  artifacts:
-    paths:
-    - target/aarch64-unknown-linux-gnu/release/parity
-    name: "aarch64-unknown-linux-gnu_parity"
-  allow_failure: true
-darwin:
-  stage: build
-  only:
-    - beta
-    - tags
-    - stable
-  script:
-    - cargo build --release $CARGOFLAGS
-    - rm -rf parity.md5
-    - md5sum target/release/parity >> parity.md5
-    - aws configure set aws_access_key_id $s3_key
-    - aws configure set aws_secret_access_key $s3_secret
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-apple-darwin/parity --body target/release/parity
-    - aws s3api put-object --bucket builds-parity --key $CI_BUILD_REF_NAME/x86_64-apple-darwin/parity.md5 --body parity.md5
-  tags:
-    - osx
-  artifacts:
-    paths:
-    - target/release/parity
-    name: "x86_64-apple-darwin_parity"
-windows:
-  stage: build
-  only:
-    - beta
-    - tags
-    - stable
-  script:
-    - set INCLUDE=C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A\Include;C:\vs2015\VC\include;C:\Program Files (x86)\Windows Kits\10\Include\10.0.10240.0\ucrt
-    - set LIB=C:\vs2015\VC\lib;C:\Program Files (x86)\Windows Kits\10\Lib\10.0.10240.0\ucrt\x64
-    - set RUST_BACKTRACE=1
-    - set RUSTFLAGS=%RUSTFLAGS% -Zorbit=off
-    - rustup default stable-x86_64-pc-windows-msvc
-    - cargo build --release %CARGOFLAGS%
-    - curl -sL --url "https://github.com/ethcore/win-build/raw/master/SimpleFC.dll" -o nsis\SimpleFC.dll
-    - curl -sL --url "https://github.com/ethcore/win-build/raw/master/vc_redist.x64.exe" -o nsis\vc_redist.x64.exe
-    - signtool sign /f %keyfile% /p %certpass% target\release\parity.exe
-    - msbuild windows\ptray\ptray.vcxproj /p:Platform=x86 /p:Configuration=Release
-    - signtool sign /f %keyfile% /p %certpass% windows\ptray\release\ptray.exe
-    - cd nsis
-    - makensis.exe installer.nsi
-    - copy installer.exe InstallParity.exe
-    - signtool sign /f %keyfile% /p %certpass% InstallParity.exe
-    - md5sums InstallParity.exe > InstallParity.exe.md5
-    - zip win-installer.zip InstallParity.exe InstallParity.exe.md5
-    - md5sums win-installer.zip > win-installer.zip.md5
-    - cd ..\target\release\
-    - md5sums parity.exe parity.pdb > parity.md5
-    - md5sums parity.exe > parity.exe.md5
-    - zip parity.zip parity.exe parity.pdb parity.md5
-    - md5sums parity.zip > parity.zip.md5
-    - cd ..\..
-    - aws configure set aws_access_key_id %s3_key%
-    - aws configure set aws_secret_access_key %s3_secret%
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity.exe --body target\release\parity.exe
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity.exe.md5 --body target\release\parity.exe.md5
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity.zip --body target\release\parity.zip
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/parity.zip.md5 --body target\release\parity.zip.md5
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/InstallParity.exe --body nsis\InstallParity.exe
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/InstallParity.exe.md5 --body nsis\InstallParity.exe.md5
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/win-installer.zip --body nsis\win-installer.zip
-    - aws s3api put-object --bucket builds-parity --key %CI_BUILD_REF_NAME%/x86_64-pc-windows-msvc/win-installer.zip.md5 --body nsis\win-installer.zip.md5
-  tags:
-   - rust-windows
-  artifacts:
-    paths:
-    - target/release/parity.exe
-    - target/release/parity.pdb
-    - nsis/InstallParity.exe
-    name: "x86_64-pc-windows-msvc_parity"
-#test-darwin:
-#  stage: build
-#  before_script:
-#    - git submodule update --init --recursive
-#  script:
-#    - export RUST_BACKTRACE=1
-#    - ./test.sh $CARGOFLAGS --no-release
-#  tags:
-#    - osx
-#test-windows:
-#  stage: build
-#  before_script:
-#    - git submodule update --init --recursive
-#  script:
-#    - set RUST_BACKTRACE=1
-#    - cargo test --features json-tests -p rlp -p ethash -p ethcore -p ethcore-bigint -p ethcore-dapps -p ethcore-rpc -p ethcore-signer -p ethcore-util -p ethcore-network -p ethcore-io -p ethkey -p ethstore -p ethsync -p ethcore-ipc -p ethcore-ipc-tests -p ethcore-ipc-nano -p parity %CARGOFLAGS% --verbose --release
-#  tags:
-#    - rust-windows
-#  allow_failure: true
+
 test-linux:
-  stage: build
-  image: ethcore/rust-test:latest
-  except:
-    - jg*
-    - ng*
+  stage: test
+  image: ethcore/rust:stable
   before_script:
     - git submodule update --init --recursive
   script:
     - export RUST_BACKTRACE=1
-    - ./test.sh $CARGOFLAGS --no-release
+    - RS_FILES_MODIFIED=$(git --no-pager diff --name-only $CI_BUILD_REF_NAME $(git merge-base $CI_BUILD_REF_NAME master) | grep \.rs | wc -l)
+    - JS_FILES_MODIFIED=$(git diff master | grep ^diff | grep -v a/js/ | wc -l)
+    -  if [ -z $RS_FILES_MODIFIED ]; then ./test.sh $CARGOFLAGS --no-release; else ./js/scripts/install-deps.sh&./js/scripts/lint.sh&./js/scripts/test.sh&./js/scripts/build.sh&./js/scripts/release.sh; fi
   tags:
     - rust-test
-js-release:
-  stage: build
-  image: ethcore/javascript:latest
-  only:
-    - master
-  before_script:
-    - ./js/scripts/install-deps.sh
-  script:
-    - ./js/scripts/build.sh
-    - ./js/scripts/release.sh
-  tags:
-    - javascript
-js-tests:
-  stage: build
-  image: ethcore/javascript:latest
-  before_script:
-    - ./js/scripts/install-deps.sh
-  script:
-    - ./js/scripts/lint.sh
-    - ./js/scripts/test.sh
-    - ./js/scripts/build.sh
-  tags:
-    - javascript-test