diff --git a/resource-managers/mesos/src/main/scala/org/apache/spark/deploy/rest/mesos/MesosRestServer.scala b/resource-managers/mesos/src/main/scala/org/apache/spark/deploy/rest/mesos/MesosRestServer.scala
index 2fd13a590324..122f5ebd5219 100644
--- a/resource-managers/mesos/src/main/scala/org/apache/spark/deploy/rest/mesos/MesosRestServer.scala
+++ b/resource-managers/mesos/src/main/scala/org/apache/spark/deploy/rest/mesos/MesosRestServer.scala
@@ -25,6 +25,7 @@ import javax.servlet.http.HttpServletResponse
 
 import org.apache.spark.{SPARK_VERSION => sparkVersion, SparkConf}
 import org.apache.spark.deploy.Command
+import org.apache.spark.deploy.mesos.config._
 import org.apache.spark.deploy.mesos.MesosDriverDescription
 import org.apache.spark.deploy.rest._
 import org.apache.spark.internal.config
@@ -80,7 +81,9 @@ private[mesos] class MesosSubmitRequestServlet(
    * This does not currently consider fields used by python applications since python
    * is not supported in mesos cluster mode yet.
    */
-  private def buildDriverDescription(request: CreateSubmissionRequest): MesosDriverDescription = {
+  // Visible for testing
+  private[rest] def buildDriverDescription(
+      request: CreateSubmissionRequest): MesosDriverDescription = {
     // Required fields, including the main class because python is not yet supported
     val appResource = Option(request.appResource).getOrElse {
       throw new SubmitRestMissingFieldException("Application jar 'appResource' is missing.")
@@ -108,6 +111,9 @@ private[mesos] class MesosSubmitRequestServlet(
     val driverCores = sparkProperties.get(config.DRIVER_CORES.key)
     val name = request.sparkProperties.getOrElse("spark.app.name", mainClass)
 
+    val defaultConf = this.conf.getAllWithPrefix(DISPATCHER_DRIVER_DEFAULT_PREFIX).toMap
+    val driverConf = new SparkConf(false).setAll(defaultConf).setAll(sparkProperties)
+
     // Construct driver description
     val conf = new SparkConf(false).setAll(sparkProperties)
     val extraClassPath = driverExtraClassPath.toSeq.flatMap(_.split(File.pathSeparator))
@@ -115,7 +121,7 @@ private[mesos] class MesosSubmitRequestServlet(
     val defaultJavaOpts = driverDefaultJavaOptions.map(Utils.splitCommandString)
       .getOrElse(Seq.empty)
     val extraJavaOpts = driverExtraJavaOptions.map(Utils.splitCommandString).getOrElse(Seq.empty)
-    val sparkJavaOpts = Utils.sparkJavaOpts(conf)
+    val sparkJavaOpts = Utils.sparkJavaOpts(driverConf)
     val javaOpts = sparkJavaOpts ++ defaultJavaOpts ++ extraJavaOpts
     val command = new Command(
       mainClass, appArgs, environmentVariables, extraClassPath, extraLibraryPath, javaOpts)
@@ -129,7 +135,7 @@ private[mesos] class MesosSubmitRequestServlet(
 
     new MesosDriverDescription(
       name, appResource, actualDriverMemory + actualDriverMemoryOverhead, actualDriverCores,
-      actualSuperviseDriver, command, request.sparkProperties, submissionId, submitDate)
+      actualSuperviseDriver, command, driverConf.getAll.toMap, submissionId, submitDate)
   }
 
   protected override def handleSubmit(
diff --git a/resource-managers/mesos/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosClusterScheduler.scala b/resource-managers/mesos/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosClusterScheduler.scala
index 289b109a4274..dff7294b4505 100644
--- a/resource-managers/mesos/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosClusterScheduler.scala
+++ b/resource-managers/mesos/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosClusterScheduler.scala
@@ -544,12 +544,13 @@ private[spark] class MesosClusterScheduler(
       SUBMIT_DEPLOY_MODE.key, // this would be set to `cluster`, but we need client
       "spark.master" // this contains the address of the dispatcher, not master
     )
-    val defaultConf = conf.getAllWithPrefix(config.DISPATCHER_DRIVER_DEFAULT_PREFIX).toMap
-    val driverConf = desc.conf.getAll
+
+    desc.conf.getAll
       .filter { case (key, _) => !replicatedOptionsBlacklist.contains(key) }
       .toMap
-    (defaultConf ++ driverConf).foreach { case (key, value) =>
-      options ++= Seq("--conf", s"${key}=${value}") }
+      .foreach { case (key, value) =>
+        options ++= Seq("--conf", s"${key}=${value}")
+      }
 
     options.map(shellEscape)
   }
diff --git a/resource-managers/mesos/src/test/scala/org/apache/spark/deploy/rest/mesos/MesosSubmitRequestServletSuite.scala b/resource-managers/mesos/src/test/scala/org/apache/spark/deploy/rest/mesos/MesosSubmitRequestServletSuite.scala
new file mode 100644
index 000000000000..15fcfe952ed8
--- /dev/null
+++ b/resource-managers/mesos/src/test/scala/org/apache/spark/deploy/rest/mesos/MesosSubmitRequestServletSuite.scala
@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.deploy.rest.mesos
+
+import org.mockito.Mockito.mock
+
+import org.apache.spark.{SparkConf, SparkFunSuite}
+import org.apache.spark.deploy.mesos.config._
+import org.apache.spark.deploy.TestPrematureExit
+import org.apache.spark.deploy.rest.{CreateSubmissionRequest, SubmitRestProtocolException}
+import org.apache.spark.scheduler.cluster.mesos.MesosClusterScheduler
+
+class MesosSubmitRequestServletSuite extends SparkFunSuite
+  with TestPrematureExit {
+
+  def buildCreateSubmissionRequest(): CreateSubmissionRequest = {
+    val request = new CreateSubmissionRequest
+    request.appResource = "hdfs://test.jar"
+    request.mainClass = "foo.Bar"
+    request.appArgs = Array.empty[String]
+    request.sparkProperties = Map.empty[String, String]
+    request.environmentVariables = Map.empty[String, String]
+    request
+  }
+
+  test("test buildDriverDescription applies default settings from dispatcher conf to Driver") {
+    val conf = new SparkConf(loadDefaults = false)
+
+    conf.set(DISPATCHER_DRIVER_DEFAULT_PREFIX + NETWORK_NAME.key, "test_network")
+    conf.set(DISPATCHER_DRIVER_DEFAULT_PREFIX + NETWORK_LABELS.key, "k0:v0,k1:v1")
+
+    val submitRequestServlet = new MesosSubmitRequestServlet(
+      scheduler = mock(classOf[MesosClusterScheduler]),
+      conf
+    )
+
+    val request = buildCreateSubmissionRequest()
+    val driverConf = submitRequestServlet.buildDriverDescription(request).conf
+
+    assert("test_network" == driverConf.get(NETWORK_NAME))
+    assert("k0:v0,k1:v1" == driverConf.get(NETWORK_LABELS))
+  }
+}
\ No newline at end of file