diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
new file mode 100644
index 000000000000..2d36da97594c
--- /dev/null
+++ b/.github/workflows/linux.yml
@@ -0,0 +1,101 @@
+name: Linux CI
+
+on: [push, pull_request]
+
+env:
+  TRAVIS_OS_NAME: linux
+  SPEC_SPLIT_DOTS: 160
+
+jobs:
+  test_linux:
+    env:
+      ARCH: x86_64
+      ARCH_CMD: linux64
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download Crystal source
+        uses: actions/checkout@v2
+
+      - name: Prepare System
+        run: bin/ci prepare_system
+
+      - name: Prepare Build
+        run: bin/ci prepare_build
+
+      - name: Test
+        run: bin/ci build
+
+  test_linux_32:
+    env:
+      ARCH: i386
+      ARCH_CMD: linux32
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download Crystal source
+        uses: actions/checkout@v2
+
+      - name: Prepare System
+        run: bin/ci prepare_system
+
+      - name: Prepare Build
+        run: bin/ci prepare_build
+
+      - name: Test
+        run: bin/ci with_build_env 'make std_spec threads=1'
+
+  test_alpine:
+    env:
+      ARCH: x86_64-musl
+      ARCH_CMD: linux64
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download Crystal source
+        uses: actions/checkout@v2
+
+      - name: Prepare System
+        run: bin/ci prepare_system
+
+      - name: Prepare Build
+        run: bin/ci prepare_build
+
+      - name: Test
+        run: bin/ci build
+
+  test_preview_mt:
+    env:
+      ARCH: x86_64
+      ARCH_CMD: linux64
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download Crystal source
+        uses: actions/checkout@v2
+
+      - name: Prepare System
+        run: bin/ci prepare_system
+
+      - name: Prepare Build
+        run: bin/ci prepare_build
+
+      - name: Make Crystal
+        run: bin/ci with_build_env 'make crystal'
+
+      - name: Test
+        run: bin/ci with_build_env 'CRYSTAL_WORKERS=4 make std_spec threads=1 FLAGS="-D preview_mt"'
+
+  check_format:
+    env:
+      ARCH: x86_64
+      ARCH_CMD: linux64
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download Crystal source
+        uses: actions/checkout@v2
+
+      - name: Prepare System
+        run: bin/ci prepare_system
+
+      - name: Prepare Build
+        run: bin/ci prepare_build
+
+      - name: Check Format
+        run: bin/ci format
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
new file mode 100644
index 000000000000..9d29a7d243a3
--- /dev/null
+++ b/.github/workflows/macos.yml
@@ -0,0 +1,25 @@
+name: macOS CI
+
+on: [push, pull_request]
+
+env:
+  TRAVIS_OS_NAME: osx
+  LLVM_CONFIG: /usr/local/opt/llvm/bin/llvm-config
+  PKG_CONFIG_PATH: /usr/local/opt/openssl/lib/pkgconfig
+  SPEC_SPLIT_DOTS: 160
+
+jobs:
+  test_macos:
+    runs-on: macos-latest
+    steps:
+      - name: Download Crystal source
+        uses: actions/checkout@v2
+
+      - name: Prepare System
+        run: bin/ci prepare_system
+
+      - name: Prepare Build
+        run: bin/ci prepare_build
+
+      - name: Test
+        run: bin/ci build
diff --git a/bin/ci b/bin/ci
index f6870d7b5bc7..85028df1d3cd 100755
--- a/bin/ci
+++ b/bin/ci
@@ -65,6 +65,15 @@ on_osx() {
   fail_on_error on_os "osx" "${@}"
 }
 
+on_github() {
+  if [ "$GITHUB_ACTIONS" = "true" ]; then
+    eval "${@}"
+    return $?
+  else
+    return 0
+  fi
+}
+
 prepare_system() {
   on_linux 'echo '"'"'{"ipv6":true, "fixed-cidr-v6":"2001:db8:1::/64"}'"'"' | sudo tee /etc/docker/daemon.json'
   on_linux sudo service docker restart
@@ -112,7 +121,8 @@ prepare_build() {
   on_osx 'pushd ~;gunzip -c ~/crystal.tar.gz | tar xopf -;mv crystal-0.34.0-1 crystal;popd'
 
   on_osx 'brew unlink python@2 || true'
-  on_osx brew install z3 llvm@10 gmp libevent pcre openssl pkg-config
+  on_osx brew install z3 llvm@10 gmp libevent pcre pkg-config
+  on_osx brew reinstall openssl
   on_osx brew link --force llvm@10
   # Note: brew link --force might show:
   #   Warning: Refusing to link macOS-provided software: llvm
@@ -137,6 +147,7 @@ verify_version() {
 
 with_build_env() {
   command="$1"
+  on_github "echo '::group::$1'"
 
   # Ensure non GMT timezone
   export TZ="America/New_York"
@@ -165,6 +176,7 @@ with_build_env() {
     -v /etc/group:/etc/group \
     -w /mnt \
     -e CRYSTAL_CACHE_DIR="/tmp/crystal" \
+    -e SPEC_SPLIT_DOTS \
     "$DOCKER_TEST_IMAGE" \
     "$ARCH_CMD" /bin/sh -c "'$command'"
 
@@ -174,6 +186,7 @@ with_build_env() {
     CRYSTAL_CACHE_DIR="/tmp/crystal" \
     /bin/sh -c "'$command'"
 
+  on_github echo "::endgroup::"
 }
 
 usage() {
diff --git a/src/spec/formatter.cr b/src/spec/formatter.cr
index e031204e109e..51b355ec075f 100644
--- a/src/spec/formatter.cr
+++ b/src/spec/formatter.cr
@@ -25,11 +25,31 @@ module Spec
 
   # :nodoc:
   class DotFormatter < Formatter
+    @count = 0
+    @split = 0
+
+    def initialize(*args)
+      super
+
+      if split = ENV["SPEC_SPLIT_DOTS"]?
+        @split = split.to_i
+      end
+    end
+
     def report(result)
       @io << Spec.color(LETTERS[result.kind], result.kind)
+      split_lines
       @io.flush
     end
 
+    private def split_lines
+      return unless @split > 0
+      if (@count += 1) >= @split
+        @io.puts
+        @count = 0
+      end
+    end
+
     def finish(elapsed_time, aborted)
       @io.puts
     end