diff --git a/packages/@aws-cdk/aws-glue/lib/job.ts b/packages/@aws-cdk/aws-glue/lib/job.ts
index 726d397ac90f3..eebb8b1acbdb0 100644
--- a/packages/@aws-cdk/aws-glue/lib/job.ts
+++ b/packages/@aws-cdk/aws-glue/lib/job.ts
@@ -692,7 +692,7 @@ export class Job extends JobBase {
    */
   private checkNoReservedArgs(defaultArguments?: { [key: string]: string }) {
     if (defaultArguments) {
-      const reservedArgs = new Set(['--conf', '--debug', '--mode', '--JOB_NAME']);
+      const reservedArgs = new Set(['--debug', '--mode', '--JOB_NAME']);
       Object.keys(defaultArguments).forEach((arg) => {
         if (reservedArgs.has(arg)) {
           throw new Error(`The ${arg} argument is reserved by Glue. Don't set it`);
diff --git a/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/aws-glue-job.assets.json b/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/aws-glue-job.assets.json
index 29ae3d1255380..8e739ca15edca 100644
--- a/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/aws-glue-job.assets.json
+++ b/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/aws-glue-job.assets.json
@@ -1,5 +1,5 @@
 {
-  "version": "22.0.0",
+  "version": "29.0.0",
   "files": {
     "432033e3218068a915d2532fa9be7858a12b228a2ae6e5c10faccd9097b1e855": {
       "source": {
@@ -14,7 +14,7 @@
         }
       }
     },
-    "0985af21379e9d6e1cba091105ecb533ee38a96b4c738816daf17d951a0752b4": {
+    "977a2f07e22679bb04b03ce83cc1fac3e6cc269a794e38248ec67106ee39f0a2": {
       "source": {
         "path": "aws-glue-job.template.json",
         "packaging": "file"
@@ -22,7 +22,7 @@
       "destinations": {
         "current_account-current_region": {
           "bucketName": "cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}",
-          "objectKey": "0985af21379e9d6e1cba091105ecb533ee38a96b4c738816daf17d951a0752b4.json",
+          "objectKey": "977a2f07e22679bb04b03ce83cc1fac3e6cc269a794e38248ec67106ee39f0a2.json",
           "assumeRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-file-publishing-role-${AWS::AccountId}-${AWS::Region}"
         }
       }
diff --git a/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/aws-glue-job.template.json b/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/aws-glue-job.template.json
index f7838294de6e4..47f34d95c01f7 100644
--- a/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/aws-glue-job.template.json
+++ b/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/aws-glue-job.template.json
@@ -173,7 +173,8 @@
       ]
      },
      "arg1": "value1",
-     "arg2": "value2"
+     "arg2": "value2",
+     "--conf": "valueConf"
     },
     "ExecutionProperty": {
      "MaxConcurrentRuns": 2
@@ -527,7 +528,8 @@
       ]
      },
      "arg1": "value1",
-     "arg2": "value2"
+     "arg2": "value2",
+     "--conf": "valueConf"
     },
     "ExecutionProperty": {
      "MaxConcurrentRuns": 2
@@ -881,7 +883,8 @@
       ]
      },
      "arg1": "value1",
-     "arg2": "value2"
+     "arg2": "value2",
+     "--conf": "valueConf"
     },
     "ExecutionProperty": {
      "MaxConcurrentRuns": 2
diff --git a/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/cdk.out b/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/cdk.out
index 145739f539580..d8b441d447f8a 100644
--- a/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/cdk.out
+++ b/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/cdk.out
@@ -1 +1 @@
-{"version":"22.0.0"}
\ No newline at end of file
+{"version":"29.0.0"}
\ No newline at end of file
diff --git a/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/integ.json b/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/integ.json
index 28e4fd8c94ff9..fa2e902e93c44 100644
--- a/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/integ.json
+++ b/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/integ.json
@@ -1,5 +1,5 @@
 {
-  "version": "22.0.0",
+  "version": "29.0.0",
   "testCases": {
     "integ.job": {
       "stacks": [
diff --git a/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/manifest.json b/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/manifest.json
index 9384baab89163..9a6172107f0bc 100644
--- a/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/manifest.json
+++ b/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/manifest.json
@@ -1,5 +1,5 @@
 {
-  "version": "22.0.0",
+  "version": "29.0.0",
   "artifacts": {
     "aws-glue-job.assets": {
       "type": "cdk:asset-manifest",
@@ -17,7 +17,7 @@
         "validateOnSynth": false,
         "assumeRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-deploy-role-${AWS::AccountId}-${AWS::Region}",
         "cloudFormationExecutionRoleArn": "arn:${AWS::Partition}:iam::${AWS::AccountId}:role/cdk-hnb659fds-cfn-exec-role-${AWS::AccountId}-${AWS::Region}",
-        "stackTemplateAssetObjectUrl": "s3://cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}/0985af21379e9d6e1cba091105ecb533ee38a96b4c738816daf17d951a0752b4.json",
+        "stackTemplateAssetObjectUrl": "s3://cdk-hnb659fds-assets-${AWS::AccountId}-${AWS::Region}/977a2f07e22679bb04b03ce83cc1fac3e6cc269a794e38248ec67106ee39f0a2.json",
         "requiresBootstrapStackVersion": 6,
         "bootstrapStackVersionSsmParameter": "/cdk-bootstrap/hnb659fds/version",
         "additionalDependencies": [
@@ -224,78 +224,6 @@
             "type": "aws:cdk:logicalId",
             "data": "CheckBootstrapVersion"
           }
-        ],
-        "EtlJobServiceRole837F781B": [
-          {
-            "type": "aws:cdk:logicalId",
-            "data": "EtlJobServiceRole837F781B",
-            "trace": [
-              "!!DESTRUCTIVE_CHANGES: WILL_DESTROY"
-            ]
-          }
-        ],
-        "EtlJobServiceRoleDefaultPolicy8BFE343B": [
-          {
-            "type": "aws:cdk:logicalId",
-            "data": "EtlJobServiceRoleDefaultPolicy8BFE343B",
-            "trace": [
-              "!!DESTRUCTIVE_CHANGES: WILL_DESTROY"
-            ]
-          }
-        ],
-        "EtlJobSparkUIBucketBF23744B": [
-          {
-            "type": "aws:cdk:logicalId",
-            "data": "EtlJobSparkUIBucketBF23744B",
-            "trace": [
-              "!!DESTRUCTIVE_CHANGES: WILL_DESTROY"
-            ]
-          }
-        ],
-        "EtlJob7FC88E45": [
-          {
-            "type": "aws:cdk:logicalId",
-            "data": "EtlJob7FC88E45",
-            "trace": [
-              "!!DESTRUCTIVE_CHANGES: WILL_DESTROY"
-            ]
-          }
-        ],
-        "EtlJobSuccessMetricRuleA72A3EF6": [
-          {
-            "type": "aws:cdk:logicalId",
-            "data": "EtlJobSuccessMetricRuleA72A3EF6",
-            "trace": [
-              "!!DESTRUCTIVE_CHANGES: WILL_DESTROY"
-            ]
-          }
-        ],
-        "StreamingJobServiceRole1B4B8BF9": [
-          {
-            "type": "aws:cdk:logicalId",
-            "data": "StreamingJobServiceRole1B4B8BF9",
-            "trace": [
-              "!!DESTRUCTIVE_CHANGES: WILL_DESTROY"
-            ]
-          }
-        ],
-        "StreamingJobServiceRoleDefaultPolicyA0CC4C68": [
-          {
-            "type": "aws:cdk:logicalId",
-            "data": "StreamingJobServiceRoleDefaultPolicyA0CC4C68",
-            "trace": [
-              "!!DESTRUCTIVE_CHANGES: WILL_DESTROY"
-            ]
-          }
-        ],
-        "StreamingJob3783CC17": [
-          {
-            "type": "aws:cdk:logicalId",
-            "data": "StreamingJob3783CC17",
-            "trace": [
-              "!!DESTRUCTIVE_CHANGES: WILL_DESTROY"
-            ]
-          }
         ]
       },
       "displayName": "aws-glue-job"
diff --git a/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/tree.json b/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/tree.json
index c601e3512008c..712c057e96df5 100644
--- a/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/tree.json
+++ b/packages/@aws-cdk/aws-glue/test/integ.job.js.snapshot/tree.json
@@ -203,13 +203,13 @@
                   "version": "0.0.0"
                 }
               },
-              "Code93a4952ea654434aca8481fb2bc2a836": {
-                "id": "Code93a4952ea654434aca8481fb2bc2a836",
-                "path": "aws-glue-job/EtlJob2.0/Code93a4952ea654434aca8481fb2bc2a836",
+              "Codebeaf1c9f157c9b396ec6972f85317dbc": {
+                "id": "Codebeaf1c9f157c9b396ec6972f85317dbc",
+                "path": "aws-glue-job/EtlJob2.0/Codebeaf1c9f157c9b396ec6972f85317dbc",
                 "children": {
                   "Stage": {
                     "id": "Stage",
-                    "path": "aws-glue-job/EtlJob2.0/Code93a4952ea654434aca8481fb2bc2a836/Stage",
+                    "path": "aws-glue-job/EtlJob2.0/Codebeaf1c9f157c9b396ec6972f85317dbc/Stage",
                     "constructInfo": {
                       "fqn": "@aws-cdk/core.AssetStaging",
                       "version": "0.0.0"
@@ -217,7 +217,7 @@
                   },
                   "AssetBucket": {
                     "id": "AssetBucket",
-                    "path": "aws-glue-job/EtlJob2.0/Code93a4952ea654434aca8481fb2bc2a836/AssetBucket",
+                    "path": "aws-glue-job/EtlJob2.0/Codebeaf1c9f157c9b396ec6972f85317dbc/AssetBucket",
                     "constructInfo": {
                       "fqn": "@aws-cdk/aws-s3.BucketBase",
                       "version": "0.0.0"
@@ -275,7 +275,8 @@
                         ]
                       },
                       "arg1": "value1",
-                      "arg2": "value2"
+                      "arg2": "value2",
+                      "--conf": "valueConf"
                     },
                     "executionProperty": {
                       "maxConcurrentRuns": 2
@@ -788,7 +789,8 @@
                         ]
                       },
                       "arg1": "value1",
-                      "arg2": "value2"
+                      "arg2": "value2",
+                      "--conf": "valueConf"
                     },
                     "executionProperty": {
                       "maxConcurrentRuns": 2
@@ -1301,7 +1303,8 @@
                         ]
                       },
                       "arg1": "value1",
-                      "arg2": "value2"
+                      "arg2": "value2",
+                      "--conf": "valueConf"
                     },
                     "executionProperty": {
                       "maxConcurrentRuns": 2
@@ -1974,7 +1977,7 @@
         "path": "Tree",
         "constructInfo": {
           "fqn": "constructs.Construct",
-          "version": "10.1.168"
+          "version": "10.1.209"
         }
       }
     },
diff --git a/packages/@aws-cdk/aws-glue/test/integ.job.ts b/packages/@aws-cdk/aws-glue/test/integ.job.ts
index 417ede1793054..791fd734fb0ca 100644
--- a/packages/@aws-cdk/aws-glue/test/integ.job.ts
+++ b/packages/@aws-cdk/aws-glue/test/integ.job.ts
@@ -38,8 +38,9 @@ const script = glue.Code.fromAsset(path.join(__dirname, 'job-script/hello_world.
     timeout: cdk.Duration.minutes(5),
     notifyDelayAfter: cdk.Duration.minutes(1),
     defaultArguments: {
-      arg1: 'value1',
-      arg2: 'value2',
+      'arg1': 'value1',
+      'arg2': 'value2',
+      '--conf': 'valueConf',
     },
     sparkUI: {
       enabled: true,
diff --git a/packages/@aws-cdk/aws-glue/test/job.test.ts b/packages/@aws-cdk/aws-glue/test/job.test.ts
index d30e5897443dd..f03d41d243494 100644
--- a/packages/@aws-cdk/aws-glue/test/job.test.ts
+++ b/packages/@aws-cdk/aws-glue/test/job.test.ts
@@ -566,7 +566,7 @@ describe('Job', () => {
     });
 
     test('with reserved args should throw', () => {
-      ['--conf', '--debug', '--mode', '--JOB_NAME'].forEach((arg, index) => {
+      ['--debug', '--mode', '--JOB_NAME'].forEach((arg, index) => {
         const defaultArguments: {[key: string]: string} = {};
         defaultArguments[arg] = 'random value';