diff --git a/.github/workflows/tracking-vertx-4.build.yml b/.github/workflows/tracking-vertx-4.build.yml
index a20ee6113..df151d038 100644
--- a/.github/workflows/tracking-vertx-4.build.yml
+++ b/.github/workflows/tracking-vertx-4.build.yml
@@ -23,7 +23,7 @@ jobs:
       matrix:
         example: [ 'session-example', 'native-sql-example' ]
         db: [ 'MySQL', 'PostgreSQL' ]
-        vertx-version: [ '[4,5)' ]
+        vertx-version: [ '[4.0,4.1)','[4.1,4.2)' ]
         exclude:
           # 'native-sql-example' doesn't run on MySQL because it has native queries
           - example: 'native-sql-example'
@@ -68,16 +68,16 @@ jobs:
           java-version: 1.8
         uses: actions/setup-java@v1
       - name: Print the effective Vert.x version used
-        run: ./gradlew :${{ matrix.example }}:dependencyInsight --dependency io.vertx --configuration runtimeClasspath -PvertxVersion='${{ matrix.vertx-version }}'
+        run: ./gradlew :${{ matrix.example }}:dependencyInsight --dependency io.vertx --configuration runtimeClasspath -PvertxVersion='${{ matrix.vertx-version }}' -PenableSonatypeOpenSourceSnapshotsRep
       - name: Run examples in '${{ matrix.example }}' on ${{ matrix.db }}
-        run: ./gradlew :${{ matrix.example }}:runAllExamplesOn${{ matrix.db }} -PvertxVersion='${{ matrix.vertx-version }}'
+        run: ./gradlew :${{ matrix.example }}:runAllExamplesOn${{ matrix.db }} -PvertxVersion='${{ matrix.vertx-version }}' -PenableSonatypeOpenSourceSnapshotsRep
 
   test_dbs:
     name: Test with ${{ matrix.db }} and latest Vert.x in ${{ matrix.vertx-version }}
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        vertx-version: ['[4,5)']
+        vertx-version: [ '[4.0,4.1)','[4.1,4.2)' ]
         db: [ 'MariaDB', 'MySQL', 'PostgreSQL', 'DB2', 'CockroachDB' ]
     steps:
       - uses: actions/checkout@v2
@@ -86,6 +86,6 @@ jobs:
         with:
           java-version: 1.8
       - name: Print the effective Vert.x version used
-        run: ./gradlew :hibernate-reactive-core:dependencyInsight --dependency io.vertx -PvertxVersion='${{ matrix.vertx-version }}'
+        run: ./gradlew :hibernate-reactive-core:dependencyInsight --dependency io.vertx -PvertxVersion='${{ matrix.vertx-version }}' -PenableSonatypeOpenSourceSnapshotsRep
       - name: Build and Test with ${{ matrix.db }}
-        run: ./gradlew build -Pdb=${{ matrix.db }} -Pdocker -PvertxVersion='${{ matrix.vertx-version }}'
+        run: ./gradlew build -Pdb=${{ matrix.db }} -Pdocker -PvertxVersion='${{ matrix.vertx-version }}' -PenableSonatypeOpenSourceSnapshotsRep
diff --git a/build.gradle b/build.gradle
index e34ec3de6..011c14199 100644
--- a/build.gradle
+++ b/build.gradle
@@ -122,7 +122,10 @@ subprojects {
         // Only enable these for local development, never push it:
         // mavenLocal()
         // jcenter()
-        // maven { url 'https://oss.sonatype.org/content/repositories/snapshots' }
+        // Example: ./gradlew build -PenableSonatypeOpenSourceSnapshotsRep
+        if ( project.hasProperty('enableSonatypeOpenSourceSnapshotsRep') ) {
+            maven { url 'https://s01.oss.sonatype.org/content/repositories/snapshots/' }
+        }
         mavenCentral()
 
         // Example: ./gradlew build -PenableJBossSnapshotsRep