diff --git a/.github/workflows/4_2_11.yml b/.github/workflows/4_2_11.yml
index 05526d9..078a4ae 100644
--- a/.github/workflows/4_2_11.yml
+++ b/.github/workflows/4_2_11.yml
@@ -89,6 +89,8 @@ jobs:
       - name: Prepare Redmine source
         working-directory: redmine
         run: |
+          # TODO Remove the following line when https://www.redmine.org/issues/40551 is fixed
+          sed -i -e 's/.*mocha.*/  gem "mocha", "2.1.0"/' Gemfile # Fix core tests not compatible with Mocha 2.2.0
           sed -i '/rubocop/d' Gemfile
           rm -f .rubocop*
           cp plugins/redmine_base_rspec/spec/support/database-${{ matrix.db }}.yml config/database.yml
diff --git a/.github/workflows/5_1_1.yml b/.github/workflows/5_1_2.yml
similarity index 94%
rename from .github/workflows/5_1_1.yml
rename to .github/workflows/5_1_2.yml
index 56b121c..25d3d55 100644
--- a/.github/workflows/5_1_1.yml
+++ b/.github/workflows/5_1_2.yml
@@ -1,8 +1,8 @@
-name: Tests 5.1.1
+name: Tests 5.1.2
 
 env:
   PLUGIN_NAME: redmine_angular_ui
-  REDMINE_VERSION: 5.1.1
+  REDMINE_VERSION: 5.1.2
   RAILS_ENV: test
 
 on:
@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby: ['3.1']
+        ruby: ['3.2']
         db: ['postgres']
       fail-fast: false
 
@@ -89,6 +89,8 @@ jobs:
       - name: Prepare Redmine source
         working-directory: redmine
         run: |
+          # TODO Remove the following line when https://www.redmine.org/issues/40551 is fixed
+          sed -i -e 's/.*mocha.*/  gem "mocha", "2.1.0"/' Gemfile # Fix core tests not compatible with Mocha 2.2.0
           rm -f test/integration/routing/plugins_test.rb # Fix routing tests # TODO Remove this line when https://www.redmine.org/issues/38707 is fixed
           sed -i '/rubocop/d' Gemfile
           rm -f .rubocop*
diff --git a/README.md b/README.md
index 5a5b67c..f5e6ea3 100644
--- a/README.md
+++ b/README.md
@@ -18,11 +18,11 @@ Test status
 
 | Plugin branch | Redmine Version | Test Status       |
 |---------------|-----------------|-------------------|
-| master        | 5.1.1           | [![5.1.1][1]][5]  |
+| master        | 5.1.2           | [![5.1.2][1]][5]  |
 | master        | 4.2.11          | [![4.2.11][2]][5] |
 | master        | master          | [![master][4]][5] |
 
-[1]: https://github.com/nanego/redmine_angular_ui/actions/workflows/5_1_1.yml/badge.svg
+[1]: https://github.com/nanego/redmine_angular_ui/actions/workflows/5_1_2.yml/badge.svg
 [2]: https://github.com/nanego/redmine_angular_ui/actions/workflows/4_2_11.yml/badge.svg
 [4]: https://github.com/nanego/redmine_angular_ui/actions/workflows/master.yml/badge.svg
 [5]: https://github.com/nanego/redmine_angular_ui/actions