diff --git a/.github/workflows/ci_tests.yaml b/.github/workflows/ci_tests.yaml
index 7cb33958b99..70177563f5b 100644
--- a/.github/workflows/ci_tests.yaml
+++ b/.github/workflows/ci_tests.yaml
@@ -60,7 +60,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ['3.12', '3.14']
-        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest, windows-latest]
+        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest, windows-latest, windows-11-arm]
         # Is it a draft Pull Request (true or false)?
         isDraft:
           - ${{ github.event.pull_request.draft }}
@@ -72,6 +72,8 @@ jobs:
             isDraft: true
           - os: windows-latest
             isDraft: true
+          - os: windows-11-arm
+            isDraft: true
         include:
           # Python 3.12 + core packages (minimum supported versions) + optional packages (minimum supported versions if any)
           - python-version: '3.12'
@@ -120,7 +122,7 @@ jobs:
 
       # Install Micromamba with conda-forge dependencies
       - name: Setup Micromamba
-        uses: mamba-org/setup-micromamba@d7c9bd84e824b79d2af72a2d4196c7f4300d3476 # v3.0.0
+        uses: mamba-org/setup-micromamba@ce51e99f4bb8a82ab7158c4dc59ef4634c59c4f9 # v3.1.0
         with:
           environment-name: pygmt
           cache-environment: true
diff --git a/.github/workflows/ci_tests_dev.yaml b/.github/workflows/ci_tests_dev.yaml
index 7c54eb37d40..10bd84575de 100644
--- a/.github/workflows/ci_tests_dev.yaml
+++ b/.github/workflows/ci_tests_dev.yaml
@@ -41,7 +41,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-26.04, ubuntu-26.04-arm, macos-26, windows-2025]
+        os: [ubuntu-26.04, ubuntu-26.04-arm, macos-26, windows-2025, windows-11-arm]
         gmt_git_ref: [master]
     timeout-minutes: 30
     defaults:
@@ -64,7 +64,7 @@ jobs:
 
       # Install Micromamba with conda-forge dependencies
       - name: Setup Micromamba
-        uses: mamba-org/setup-micromamba@d7c9bd84e824b79d2af72a2d4196c7f4300d3476 # v3.0.0
+        uses: mamba-org/setup-micromamba@ce51e99f4bb8a82ab7158c4dc59ef4634c59c4f9 # v3.1.0
         with:
           environment-name: pygmt
           cache-environment: true
diff --git a/.github/workflows/ci_tests_legacy.yaml b/.github/workflows/ci_tests_legacy.yaml
index 1e4e7f33f58..6c617408f10 100644
--- a/.github/workflows/ci_tests_legacy.yaml
+++ b/.github/workflows/ci_tests_legacy.yaml
@@ -36,7 +36,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04, ubuntu-22.04-arm, macos-14, windows-2022]
+        os: [ubuntu-22.04, ubuntu-22.04-arm, macos-14, windows-2022, windows-11-arm]
         gmt_version: ['6.5']
     timeout-minutes: 30
     defaults:
@@ -54,7 +54,7 @@ jobs:
 
       # Install Micromamba with conda-forge dependencies
       - name: Setup Micromamba
-        uses: mamba-org/setup-micromamba@d7c9bd84e824b79d2af72a2d4196c7f4300d3476 # v3.0.0
+        uses: mamba-org/setup-micromamba@ce51e99f4bb8a82ab7158c4dc59ef4634c59c4f9 # v3.1.0
         with:
           environment-name: pygmt
           create-args: >-
diff --git a/pygmt/tests/test_contour.py b/pygmt/tests/test_contour.py
index 05ec84f055d..02629448cb3 100644
--- a/pygmt/tests/test_contour.py
+++ b/pygmt/tests/test_contour.py
@@ -39,7 +39,7 @@ def fixture_region():
         and platform.machine() == "x86_64"
         and platform.freedesktop_os_release()["PRETTY_NAME"].startswith("Ubuntu 26.04")
     ),
-    reason="Fails on Linux ARM64 and Ubuntu 26.04 x86_64",
+    reason="Fails on ARM64 and Ubuntu 26.04 x86_64",
 )
 def test_contour_vec(region):
     """
@@ -164,7 +164,7 @@ def test_contour_multiple_levels(region):
         and platform.machine() == "x86_64"
         and platform.freedesktop_os_release()["PRETTY_NAME"].startswith("Ubuntu 26.04")
     ),
-    reason="Fails on Linux ARM64 and Ubuntu 26.04 x86_64",
+    reason="Fails on ARM64 and Ubuntu 26.04 x86_64",
 )
 def test_contour_incols_transposed_data(region):
     """