diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 13edd388..00000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,212 +0,0 @@
-version: 2.1
-
-orbs:
-  browser-tools: circleci/browser-tools@1.1.3
-workflows:
-  version: 2
-  build_and_test:
-    jobs:
-      - build_and_unit_test
-      - integration_test_readonly:
-          requires:
-            - build_and_unit_test
-      - integration_test_readwrite:
-          requires:
-            - build_and_unit_test
-executors:
-  node:
-    working_directory: ~/pinafore
-    docker:
-      - image: cimg/ruby:3.0.3-browsers
-  node_and_ruby:
-    working_directory: ~/pinafore
-    docker:
-      - image: cimg/ruby:3.0.3-browsers
-      - image: circleci/postgres:12.2
-        environment:
-          POSTGRES_USER: pinafore
-          POSTGRES_PASSWORD: pinafore
-          POSTGRES_DB: pinafore_development
-          BROWSER: chrome:headless
-      - image: circleci/redis:5-alpine
-commands:
-  install_mastodon_system_dependencies:
-    description: Install system dependencies that Mastodon requires
-    steps:
-      - run:
-          name: Install system dependencies
-          command: |
-            sudo apt-get update
-            sudo apt-get install -y \
-              ffmpeg \
-              fonts-noto-color-emoji \
-              imagemagick \
-              libicu-dev \
-              libidn11-dev \
-              libprotobuf-dev \
-              postgresql-contrib \
-              protobuf-compiler
-  install_browsers:
-    description: Install browsers and tools
-    steps:
-      - browser-tools/install-chrome:
-          chrome-version: 91.0.4472.114
-      - browser-tools/install-chromedriver
-      - run:
-          name: "Check browser version"
-          command: |
-            google-chrome --version
-  install_node:
-    description: Install Node.js
-    steps:
-      - run:
-          name: "Install Node.js"
-          # via https://circleci.com/docs/2.0/circleci-images/#notes-on-pinning-images
-          command: |
-            curl -sSL "https://nodejs.org/dist/v14.21.1/node-v14.21.1-linux-x64.tar.xz" \
-            | sudo tar --strip-components=2 -xJ -C /usr/local/bin/ node-v14.21.1-linux-x64/bin/node
-      - run:
-          name: Check current version of node
-          command: node -v
-
-  save_workspace:
-    description: Persist workspace
-    steps:
-      - persist_to_workspace:
-          root: .
-          paths:
-            - .
-  load_workspace:
-    description: Load workspace
-    steps:
-      - attach_workspace:
-          at: ~/pinafore
-  restore_yarn_cache:
-    description: Restore yarn cache
-    steps:
-      - restore_cache:
-          name: Restore yarn cache
-          key: yarn-v4-{{ checksum "yarn.lock" }}
-  save_yarn_cache:
-    description: Save yarn cache
-    steps:
-      - save_cache:
-          name: Save yarn cache
-          key: yarn-v4-{{ checksum "yarn.lock" }}
-          paths:
-            - ~/.cache/yarn
-  restore_yarn_cache_mastodon:
-    description: Restore yarn cache for Mastodon
-    steps:
-      - restore_cache:
-          name: Restore yarn cache for Mastodon
-          key: yarn-v4-{{ checksum "mastodon/yarn.lock" }}
-  save_yarn_cache_mastodon:
-    description: Save yarn cache for Mastodon
-    steps:
-      - save_cache:
-          name: Save yarn cache for Mastodon
-          key: yarn-v4-{{ checksum "mastodon/yarn.lock" }}
-          paths:
-            - ~/.cache/yarn
-  restore_bundler_cache:
-    description: Restore bundler cache
-    steps:
-      - restore_cache:
-          name: Restore bundler cache
-          key: bundler-v4-{{ checksum "mastodon/Gemfile.lock" }}
-  save_bundler_cache:
-    description: Save bundler cache
-    steps:
-      - save_cache:
-          name: Save bundler cache
-          key: bundler-v4-{{ checksum "mastodon/Gemfile.lock" }}
-          paths:
-            - mastodon/vendor/bundle
-  install_mastodon:
-    description: Install Mastodon and set up Postgres/Redis
-    steps:
-      - run:
-          name: Clone mastodon
-          command: yarn clone-mastodon
-      - restore_yarn_cache_mastodon
-      - restore_bundler_cache
-      - run:
-          name: Install mastodon
-          command: yarn install-mastodon
-      - save_yarn_cache_mastodon
-      - save_bundler_cache
-      - run:
-          name: Wait for postgres to be ready
-          command: |
-            for i in `seq 1 10`;
-            do
-              nc -z localhost 5432 && echo Success && exit 0
-              echo -n .
-              sleep 1
-            done
-            echo Failed waiting for postgres && exit 1
-      - run:
-          name: Wait for redis to be ready
-          command: |
-            for i in `seq 1 10`;
-            do
-              nc -z localhost 6379 && echo Success && exit 0
-              echo -n .
-              sleep 1
-            done
-            echo Failed waiting for redis && exit 1
-jobs:
-  build_and_unit_test:
-    executor: node
-    steps:
-      - checkout
-      - install_node
-      - restore_yarn_cache
-      - run:
-          name: Yarn install
-          command: yarn install --frozen-lockfile
-      - save_yarn_cache
-      - run:
-          name: Lint
-          command: yarn lint
-      - run:
-          name: Copy vercel.json
-          command: cp vercel.json vercel-old.json
-      - run:
-          name: Build
-          command: yarn build
-      - run:
-          name: Check vercel.json unchanged
-          command: |
-            if ! diff -q vercel-old.json vercel.json &>/dev/null; then
-              diff vercel-old.json vercel.json
-              echo "vercel.json changed, run yarn build and make sure everything looks okay"
-              exit 1
-            fi
-      - run:
-          name: Unit tests
-          command: yarn test-unit
-      - save_workspace
-  integration_test_readonly:
-    executor: node_and_ruby
-    steps:
-      - install_mastodon_system_dependencies
-      - install_browsers
-      - install_node
-      - load_workspace
-      - install_mastodon
-      - run:
-          name: Read-only integration tests
-          command: yarn test-in-ci-suite0
-  integration_test_readwrite:
-    executor: node_and_ruby
-    steps:
-      - install_mastodon_system_dependencies
-      - install_browsers
-      - install_node
-      - load_workspace
-      - install_mastodon
-      - run:
-          name: Read-write integration tests
-          command: yarn test-in-ci-suite1
diff --git a/.github/workflows/e2e-tests.yml b/.github/workflows/e2e-tests.yml
new file mode 100644
index 00000000..7dd56539
--- /dev/null
+++ b/.github/workflows/e2e-tests.yml
@@ -0,0 +1,49 @@
+name: Tests
+on:
+  pull_request:
+    branches: [ master ]
+jobs:
+  build:
+    runs-on: ubuntu-18.04
+    services:
+      postgres:
+        image: postgres:12.2
+        env:
+          POSTGRES_USER: pinafore
+          POSTGRES_PASSWORD: pinafore
+          POSTGRES_DB: pinafore_development
+          POSTGRES_HOST: localhost
+        ports:
+          - 5432/tcp
+        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
+      redis:
+        image: redis:5
+        ports:
+          - 6379/tcp
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+          cache: 'yarn'
+      - uses: actions/setup-ruby@v1
+        with:
+          ruby-version: '3.0.3'
+      - name: Install Mastodon system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            ffmpeg \
+            fonts-noto-color-emoji \
+            imagemagick \
+            libicu-dev \
+            libidn11-dev \
+            libprotobuf-dev \
+            postgresql-contrib \
+            protobuf-compiler
+      - run: yarn --frozen-lockfile
+      - run: yarn build
+      - name: Readonly e2e tests
+        run: yarn test-in-ci-suite0
+      - name: Read-write e2e tests
+        run: yarn test-in-ci-suite1
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
new file mode 100644
index 00000000..cbb79b12
--- /dev/null
+++ b/.github/workflows/unit-tests.yml
@@ -0,0 +1,16 @@
+name: Unit tests
+on:
+  pull_request:
+    branches: [ master ]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+          cache: 'yarn'
+      - run: yarn --frozen-lockfile
+      - run: yarn lint
+      - run: yarn test-unit
diff --git a/bin/test-vercel-json-unchanged.sh b/bin/test-vercel-json-unchanged.sh
new file mode 100755
index 00000000..76e271ea
--- /dev/null
+++ b/bin/test-vercel-json-unchanged.sh
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+# In CI, we need to make sure the vercel.json file is built correctly,
+# or else it will mess up the deployment to Vercel
+
+if ! diff -q vercel-old.json vercel.json &>/dev/null; then
+  diff vercel-old.json vercel.json
+  echo "vercel.json changed, run yarn build and make sure everything looks okay"
+  exit 1
+fi
diff --git a/package.json b/package.json
index fee49c09..4ab9bece 100644
--- a/package.json
+++ b/package.json
@@ -36,6 +36,7 @@
     "test-unit": "NODE_ENV=test mocha -r bin/browser-shim.js tests/unit/",
     "test-in-ci-suite0": "cross-env BROWSER=chrome:headless run-p --race run-mastodon start test-mastodon-suite0",
     "test-in-ci-suite1": "cross-env BROWSER=chrome:headless run-p --race run-mastodon start test-mastodon-suite1",
+    "test-vercel-json-unchanged": "./bin/test-vercel-json-unchanged.sh",
     "wait-for-mastodon-to-start": "node bin/wait-for-mastodon-to-start.js",
     "wait-for-mastodon-data": "node bin/wait-for-mastodon-data.js",
     "backup-mastodon-data": "./bin/backup-mastodon-data.sh",