From 3163ec747d4caf13a44c2d389ab220245e768eb6 Mon Sep 17 00:00:00 2001
From: Wei Ji <23487320+weiji14@users.noreply.github.com>
Date: Fri, 12 Jun 2026 10:34:46 +1200
Subject: [PATCH 1/2] CI: Use ubuntu-26.04 in the GMT Dev Tests workflow

Xref https://github.blog/changelog/2026-06-11-new-runner-images-in-public-preview/
---
 .github/workflows/ci_tests_dev.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/ci_tests_dev.yaml b/.github/workflows/ci_tests_dev.yaml
index f185b087a27..40fa89e99e8 100644
--- a/.github/workflows/ci_tests_dev.yaml
+++ b/.github/workflows/ci_tests_dev.yaml
@@ -39,7 +39,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-24.04, ubuntu-24.04-arm, macos-26, windows-2025]
+        os: [ubuntu-26.04, ubuntu-26.04-arm, macos-26, windows-2025]
         gmt_git_ref: [master]
     timeout-minutes: 30
     defaults:

From ea6e09ddc166f4fb54c84cae5f991577d7cf6785 Mon Sep 17 00:00:00 2001
From: Wei Ji <23487320+weiji14@users.noreply.github.com>
Date: Fri, 12 Jun 2026 10:38:26 +1200
Subject: [PATCH 2/2] Set deployment: false for environment

Xref https://github.blog/changelog/2026-03-19-github-actions-late-march-2026-updates/#github-actions-now-allows-developers-to-use-environments-without-auto-deployment
---
 .github/workflows/ci_tests_dev.yaml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci_tests_dev.yaml b/.github/workflows/ci_tests_dev.yaml
index 40fa89e99e8..8a4d84e1ab4 100644
--- a/.github/workflows/ci_tests_dev.yaml
+++ b/.github/workflows/ci_tests_dev.yaml
@@ -34,7 +34,9 @@ jobs:
   test_gmt_dev:
     name: ${{ matrix.os }} - GMT ${{ matrix.gmt_git_ref }}
     runs-on: ${{ matrix.os }}
-    environment: pr-tests
+    environment:
+      name: pr-tests
+      deployment: false
     if: github.event_name != 'pull_request' || contains(github.event.pull_request.labels.*.name, 'run/test-gmt-dev')
     strategy:
       fail-fast: false