diff --git a/.github/workflows/ruby_event_store-outbox_test.yml b/.github/workflows/ruby_event_store-outbox_test.yml
index 830899d326..86498452d4 100644
--- a/.github/workflows/ruby_event_store-outbox_test.yml
+++ b/.github/workflows/ruby_event_store-outbox_test.yml
@@ -97,40 +97,4 @@ jobs:
               ];
             }
           "
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-
-  mutate:
-    runs-on: ubuntu-20.04
-    env:
-      WORKING_DIRECTORY: contrib/ruby_event_store-outbox
-      BUNDLE_GEMFILE: Gemfile
-    strategy:
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-      - uses: cachix/install-nix-action@v20
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
-      - uses: cachix/cachix-action@v12
-        with:
-          name: railseventstore
-          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
-      - run: test -e ${{ env.BUNDLE_GEMFILE }}.lock
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: ruby-3.2
-          bundler-cache: true
-          working-directory: ${{ env.WORKING_DIRECTORY }}
-      - run: |
-          nix-shell --run "make mutate-changes" -E"
-            with import <nixpkgs> { };
-            mkShell {
-              inputsFrom = [
-                (import ../../support/nix/redis.nix)
-              ];
-            }
-          "
         working-directory: ${{ env.WORKING_DIRECTORY }}
\ No newline at end of file
diff --git a/.github/workflows/ruby_event_store-rom_test.yml b/.github/workflows/ruby_event_store-rom_test.yml
index 48e1d9e638..5d9fda02da 100644
--- a/.github/workflows/ruby_event_store-rom_test.yml
+++ b/.github/workflows/ruby_event_store-rom_test.yml
@@ -111,25 +111,4 @@ jobs:
           bundler-cache: true
           working-directory: ${{ env.WORKING_DIRECTORY }}
       - run: make test
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-
-  mutate:
-    runs-on: ubuntu-20.04
-    env:
-      WORKING_DIRECTORY: contrib/ruby_event_store-rom
-      BUNDLE_GEMFILE: Gemfile
-    strategy:
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-      - run: test -e ${{ env.BUNDLE_GEMFILE }}.lock
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: ruby-3.2
-          bundler-cache: true
-          working-directory: ${{ env.WORKING_DIRECTORY }}
-      - run: make mutate-changes
-        working-directory: ${{ env.WORKING_DIRECTORY }}
+        working-directory: ${{ env.WORKING_DIRECTORY }}
\ No newline at end of file
diff --git a/.github/workflows/ruby_event_store-sequel_test.yml b/.github/workflows/ruby_event_store-sequel_test.yml
index 448726cf11..99892aa9e7 100644
--- a/.github/workflows/ruby_event_store-sequel_test.yml
+++ b/.github/workflows/ruby_event_store-sequel_test.yml
@@ -111,25 +111,4 @@ jobs:
           bundler-cache: true
           working-directory: ${{ env.WORKING_DIRECTORY }}
       - run: make test
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-
-  mutate:
-    runs-on: ubuntu-20.04
-    env:
-      WORKING_DIRECTORY: contrib/ruby_event_store-sequel
-      BUNDLE_GEMFILE: Gemfile
-    strategy:
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-      - run: test -e ${{ env.BUNDLE_GEMFILE }}.lock
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: ruby-3.2
-          bundler-cache: true
-          working-directory: ${{ env.WORKING_DIRECTORY }}
-      - run: make mutate-changes
-        working-directory: ${{ env.WORKING_DIRECTORY }}
+        working-directory: ${{ env.WORKING_DIRECTORY }}
\ No newline at end of file
diff --git a/.github/workflows/ruby_event_store-sidekiq_scheduler_test.yml b/.github/workflows/ruby_event_store-sidekiq_scheduler_test.yml
index 65a5e89704..ebb4e275dd 100644
--- a/.github/workflows/ruby_event_store-sidekiq_scheduler_test.yml
+++ b/.github/workflows/ruby_event_store-sidekiq_scheduler_test.yml
@@ -71,40 +71,4 @@ jobs:
               ];
             }
           "
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-
-  mutate:
-    runs-on: ubuntu-20.04
-    env:
-      WORKING_DIRECTORY: contrib/ruby_event_store-sidekiq_scheduler
-      BUNDLE_GEMFILE: Gemfile
-    strategy:
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-      - uses: cachix/install-nix-action@v20
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
-      - uses: cachix/cachix-action@v12
-        with:
-          name: railseventstore
-          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
-      - run: test -e ${{ env.BUNDLE_GEMFILE }}.lock
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: ruby-3.2
-          bundler-cache: true
-          working-directory: ${{ env.WORKING_DIRECTORY }}
-      - run: |
-          nix-shell --run "make mutate-changes" -E"
-            with import <nixpkgs> { };
-            mkShell {
-              inputsFrom = [
-                (import ../../support/nix/redis.nix)
-              ];
-            }
-          "
-        working-directory: ${{ env.WORKING_DIRECTORY }}
+        working-directory: ${{ env.WORKING_DIRECTORY }}
\ No newline at end of file
diff --git a/support/ci/outbox.yaml.erb b/support/ci/outbox.yaml.erb
index f56e54859a..480a611dfe 100644
--- a/support/ci/outbox.yaml.erb
+++ b/support/ci/outbox.yaml.erb
@@ -71,40 +71,4 @@ jobs:
               ];
             }
           "
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-
-  mutate:
-    runs-on: ubuntu-20.04
-    env:
-      WORKING_DIRECTORY: <%= working_directory %>
-      BUNDLE_GEMFILE: Gemfile
-    strategy:
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-      - uses: cachix/install-nix-action@v20
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
-      - uses: cachix/cachix-action@v12
-        with:
-          name: railseventstore
-          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
-      - run: test -e ${{ env.BUNDLE_GEMFILE }}.lock
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: ruby-3.2
-          bundler-cache: true
-          working-directory: ${{ env.WORKING_DIRECTORY }}
-      - run: |
-          nix-shell --run "make mutate-changes" -E"
-            with import <nixpkgs> { };
-            mkShell {
-              inputsFrom = [
-                (import ../../support/nix/redis.nix)
-              ];
-            }
-          "
         working-directory: ${{ env.WORKING_DIRECTORY }}
\ No newline at end of file
diff --git a/support/ci/rom.yaml.erb b/support/ci/rom.yaml.erb
index 2476288eb4..fab800d80b 100644
--- a/support/ci/rom.yaml.erb
+++ b/support/ci/rom.yaml.erb
@@ -72,25 +72,4 @@ jobs:
           bundler-cache: true
           working-directory: ${{ env.WORKING_DIRECTORY }}
       - run: make test
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-
-  mutate:
-    runs-on: ubuntu-20.04
-    env:
-      WORKING_DIRECTORY: <%= working_directory %>
-      BUNDLE_GEMFILE: Gemfile
-    strategy:
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-      - run: test -e ${{ env.BUNDLE_GEMFILE }}.lock
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: ruby-3.2
-          bundler-cache: true
-          working-directory: ${{ env.WORKING_DIRECTORY }}
-      - run: make mutate-changes
-        working-directory: ${{ env.WORKING_DIRECTORY }}
+        working-directory: ${{ env.WORKING_DIRECTORY }}
\ No newline at end of file
diff --git a/support/ci/scheduler.yaml.erb b/support/ci/scheduler.yaml.erb
index 7215ab0cbd..34f97a0c2e 100644
--- a/support/ci/scheduler.yaml.erb
+++ b/support/ci/scheduler.yaml.erb
@@ -54,40 +54,4 @@ jobs:
               ];
             }
           "
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-
-  mutate:
-    runs-on: ubuntu-20.04
-    env:
-      WORKING_DIRECTORY: <%= working_directory %>
-      BUNDLE_GEMFILE: Gemfile
-    strategy:
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-      - uses: cachix/install-nix-action@v20
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
-      - uses: cachix/cachix-action@v12
-        with:
-          name: railseventstore
-          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
-      - run: test -e ${{ env.BUNDLE_GEMFILE }}.lock
-        working-directory: ${{ env.WORKING_DIRECTORY }}
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: ruby-3.2
-          bundler-cache: true
-          working-directory: ${{ env.WORKING_DIRECTORY }}
-      - run: |
-          nix-shell --run "make mutate-changes" -E"
-            with import <nixpkgs> { };
-            mkShell {
-              inputsFrom = [
-                (import ../../support/nix/redis.nix)
-              ];
-            }
-          "
-        working-directory: ${{ env.WORKING_DIRECTORY }}
+        working-directory: ${{ env.WORKING_DIRECTORY }}
\ No newline at end of file