diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0451d54a4..5afe41779 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -96,6 +96,26 @@ jobs:
           check_name: Test Report Scala 3.x
           annotate_only: true
           detailed_summary: true
+  test_3_latest:
+    name: Scala 3.4.x
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'zulu'
+          java-version: '21'
+      - name: Scala 3.4.x test
+        # Test only Scala 3 supported projects
+        run: SCALA_VERSION=3.4.2 ./sbt "projectDotty/test; dottyTest/run"
+      - name: Publish Test Report
+        uses: mikepenz/action-junit-report@v4
+        if: always() # always run even if the previous step fails
+        with:
+          report_paths: '**/target/test-reports/TEST-*.xml'
+          check_name: Test Report Scala 3.4.x
+          annotate_only: true
+          detailed_summary: true
   test_3_latest_jdk:
     name: Scala 3 / JDK17
     runs-on: ubuntu-latest
diff --git a/build.sbt b/build.sbt
index a0935b422..8c1e4afdb 100644
--- a/build.sbt
+++ b/build.sbt
@@ -3,7 +3,7 @@ import xerial.sbt.pack.PackPlugin.{projectSettings, publishPackArchiveTgz}
 
 val SCALA_2_12          = "2.12.19"
 val SCALA_2_13          = "2.13.14"
-val SCALA_3             = "3.3.3"
+val SCALA_3             = sys.env.getOrElse("SCALA_VERSION", "3.3.3")
 val uptoScala2          = SCALA_2_13 :: SCALA_2_12 :: Nil
 val targetScalaVersions = SCALA_3 :: uptoScala2