diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0ff9f2e4..332154fb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,9 +9,9 @@ name: Continuous Integration
 
 on:
   pull_request:
-    branches: ['2.*']
+    branches: [2.*]
   push:
-    branches: ['2.*']
+    branches: [2.*]
     tags: [v*]
 
 env:
@@ -64,6 +64,9 @@ jobs:
           java-version: 21
           cache: sbt
 
+      - name: Check that workflows are up to date
+        run: sbt -J-Xmx2G '++ ${{ matrix.scala }}' githubWorkflowCheck
+
       - run: sbt -J-Xmx2G '++ ${{ matrix.scala }}' test mimaReportBinaryIssues
 
       - name: Compress target directories
diff --git a/.github/workflows/ci3.yml b/.github/workflows/ci3.yml
deleted file mode 100644
index 98d43540..00000000
--- a/.github/workflows/ci3.yml
+++ /dev/null
@@ -1,129 +0,0 @@
-# This file was automatically generated by sbt-github-actions using the
-# githubWorkflowGenerate task. You should add and commit this file to
-# your git repository. It goes without saying that you shouldn't edit
-# this file by hand! Instead, if you wish to make changes, you should
-# change your sbt build configuration to revise the workflow description
-# to meet your needs, then regenerate this file.
-
-name: Continuous Integration (v3 - master)
-
-on:
-  pull_request:
-    branches: ['master']
-  push:
-    branches: ['master']
-
-env:
-  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-jobs:
-  build:
-    name: Build and Test
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-        scala: [2.11.12, 2.12.20, 2.13.15, 3.3.4]
-        java: [zulu@17, zulu@21]
-    runs-on: ${{ matrix.os }}
-    steps:
-      - name: Checkout current branch (full)
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
-      - name: Setup Java (zulu@17)
-        if: matrix.java == 'zulu@17'
-        uses: actions/setup-java@v4
-        with:
-          distribution: zulu
-          java-version: 17
-          cache: sbt
-
-      - name: Setup Java (zulu@21)
-        if: matrix.java == 'zulu@21'
-        uses: actions/setup-java@v4
-        with:
-          distribution: zulu
-          java-version: 21
-          cache: sbt
-
-      - run: sbt -J-Xmx2G '++ ${{ matrix.scala }}' test mimaReportBinaryIssues
-
-      - name: Compress target directories
-        run: tar cf targets.tar target project/target
-
-      - name: Upload target directories
-        uses: actions/upload-artifact@v4
-        with:
-          name: target-${{ matrix.os }}-${{ matrix.scala }}-${{ matrix.java }}
-          path: targets.tar
-
-  publish:
-    name: Publish Artifacts
-    needs: [build]
-    if: github.event_name != 'pull_request' && github.ref == 'refs/heads/master'
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-        scala: [2.13.15]
-    runs-on: ${{ matrix.os }}
-    steps:
-      - name: Checkout current branch (full)
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
-      - name: Setup Java (zulu@17)
-        uses: actions/setup-java@v4
-        with:
-          distribution: zulu
-          java-version: 17
-          cache: sbt
-
-      - name: Download target directories (2.11.12)
-        uses: actions/download-artifact@v4
-        with:
-          name: target-${{ matrix.os }}-2.11.12-${{ matrix.java }}
-
-      - name: Inflate target directories (2.11.12)
-        run: |
-          tar xf targets.tar
-          rm targets.tar
-
-      - name: Download target directories (2.12.20)
-        uses: actions/download-artifact@v4
-        with:
-          name: target-${{ matrix.os }}-2.12.20-${{ matrix.java }}
-
-      - name: Inflate target directories (2.12.20)
-        run: |
-          tar xf targets.tar
-          rm targets.tar
-
-      - name: Download target directories (2.13.15)
-        uses: actions/download-artifact@v4
-        with:
-          name: target-${{ matrix.os }}-2.13.15-${{ matrix.java }}
-
-      - name: Inflate target directories (2.13.15)
-        run: |
-          tar xf targets.tar
-          rm targets.tar
-
-      - name: Download target directories (3.3.4)
-        uses: actions/download-artifact@v4
-        with:
-          name: target-${{ matrix.os }}-3.3.4-${{ matrix.java }}
-
-      - name: Inflate target directories (3.3.4)
-        run: |
-          tar xf targets.tar
-          rm targets.tar
-
-      - env:
-          CI_SNAPSHOT_RELEASE: +publishSigned
-          PGP_PASSPHRASE: ${{ secrets.PGP_PASSPHRASE }}
-          SONATYPE_PASSWORD: ${{ secrets.CI_DEPLOY_PASSWORD3 }}
-          SONATYPE_USERNAME: ${{ secrets.CI_DEPLOY_USERNAME3 }}
-          PGP_SECRET: ${{ secrets.PGP_SECRET }}
-        run: sbt -J-Xmx2G ci-release
diff --git a/build.sbt b/build.sbt
index b59267e8..4729af70 100644
--- a/build.sbt
+++ b/build.sbt
@@ -155,9 +155,9 @@ ThisBuild / githubWorkflowSbtCommand := "sbt -J-Xmx2G"
 ThisBuild / githubWorkflowJavaVersions := Seq(JavaSpec(Zulu, "8"), JavaSpec(Zulu, "11"),
   JavaSpec(Zulu, "17"), JavaSpec(Zulu, "21"))
 ThisBuild / githubWorkflowBuild := Seq(WorkflowStep.Sbt(List("test", "mimaReportBinaryIssues")))
+ThisBuild / githubWorkflowTargetBranches := Seq("2.*")
 ThisBuild / githubWorkflowTargetTags ++= Seq("v*")
 ThisBuild / githubWorkflowPublishTargetBranches := Seq(
-  RefPredicate.Equals(Ref.Branch("master")),
   RefPredicate.StartsWith(Ref.Branch("2.")),
   RefPredicate.StartsWith(Ref.Tag("v"))
 )