diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c30eb63..6486927 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -90,7 +90,7 @@ jobs:
           - 'min'
           - 'lts'
           - '1' # automatically expands to the latest stable 1.x release of Julia
-          - 'nightly'
+          - 'pre' # expands to latest alpha, beta or RC, if available, otherwise same as `1`
         os:
           - ubuntu-latest
         arch:
@@ -123,7 +123,7 @@ jobs:
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v5
         with:
-          file: lcov.info
+          files: lcov.info
   test_monorepo:
     name: Monorepo dev - Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/ci_nightly.yml b/.github/workflows/ci_nightly.yml
new file mode 100644
index 0000000..43f6ea8
--- /dev/null
+++ b/.github/workflows/ci_nightly.yml
@@ -0,0 +1,108 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+name: Nightly
+on:
+  schedule:
+    - cron: 0 0 * * 1 # run once a week on Mondays
+  workflow_dispatch:
+jobs:
+  test:
+    name: ${{ matrix.pkg.name }} - Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ matrix.nthreads }} threads - ${{ github.event_name }}
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 45
+    strategy:
+      fail-fast: false
+      matrix:
+        pkg:
+          - name: Arrow.jl
+            dir: '.'
+          - name: ArrowTypes.jl
+            dir: './src/ArrowTypes'
+        version:
+          - 'nightly'
+        os:
+          - ubuntu-latest
+        arch:
+          - x64
+        nthreads: [1, 2]
+    steps:
+      - uses: actions/checkout@v5
+      - uses: julia-actions/setup-julia@v2
+        with:
+          version: ${{ matrix.version }}
+          arch: ${{ matrix.arch }}
+      - uses: actions/cache@v4
+        env:
+          cache-name: cache-artifacts
+        with:
+          path: ~/.julia/artifacts
+          key: ${{ runner.os }}-test-${{ env.cache-name }}-${{ hashFiles('**/Project.toml') }}
+          restore-keys: |
+            ${{ runner.os }}-test-${{ env.cache-name }}-
+            ${{ runner.os }}-test-
+            ${{ runner.os }}-
+      - uses: julia-actions/julia-buildpkg@v1.6
+        with:
+          project: ${{ matrix.pkg.dir }}
+      - uses: julia-actions/julia-runtest@v1
+        env:
+          JULIA_NUM_THREADS: ${{ matrix.nthreads }}
+        with:
+          project: ${{ matrix.pkg.dir }}
+      - uses: julia-actions/julia-processcoverage@v1
+      - uses: codecov/codecov-action@v5
+        with:
+          files: lcov.info
+  test_monorepo:
+    name: Monorepo dev - Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 30
+    strategy:
+      fail-fast: true
+      matrix:
+        version:
+          - 'nightly'
+        os:
+          - ubuntu-latest
+        arch:
+          - x64
+    steps:
+      - uses: actions/checkout@v5
+      - uses: julia-actions/setup-julia@v2
+        with:
+          version: ${{ matrix.version }}
+          arch: ${{ matrix.arch }}
+      - uses: actions/cache@v4
+        env:
+          cache-name: cache-artifacts
+        with:
+          path: ~/.julia/artifacts
+          key: ${{ runner.os }}-test-${{ env.cache-name }}-${{ hashFiles('**/Project.toml') }}
+          restore-keys: |
+            ${{ runner.os }}-test-${{ env.cache-name }}-
+            ${{ runner.os }}-test-
+            ${{ runner.os }}-
+      - name: Dev monorepo dependencies
+        shell: julia --project=monorepo {0}
+        run: |
+          using Pkg;
+          Pkg.develop([PackageSpec(path="."), PackageSpec(path="src/ArrowTypes")])
+      - name: Run monorepo tests
+        continue-on-error: false
+        run: >
+          julia --color=yes --project=monorepo -e 'using Pkg; Pkg.test("Arrow")'
diff --git a/.gitignore b/.gitignore
index 6027399..4c10e7e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@
 # under the License.
 
 Manifest.toml
+Manifest-v*.toml
 .DS_STORE
 *.jl.cov
 *.jl.*.cov