Github user ifndef-SleePy commented on a diff in the pull request:

    https://github.com/apache/flink/pull/3810#discussion_r115133175
  
    --- Diff: 
flink-test-utils-parent/flink-test-utils/src/main/java/org/apache/flink/test/util/MultipleProgramsTestBase.java
 ---
    @@ -80,29 +80,36 @@
        
        protected final TestExecutionMode mode;
     
    -   
    +   private TestEnvironment testEnvironment;
    +
    +   private CollectionTestEnvironment collectionTestEnvironment;
    +
        public MultipleProgramsTestBase(TestExecutionMode mode) {
                this.mode = mode;
    -           
    +
                switch(mode){
                        case CLUSTER:
    -                           new TestEnvironment(cluster, 4).setAsContext();
    +                           testEnvironment = new TestEnvironment(cluster, 
4);
    --- End diff --
    
    @zentol I just found that I can not move these codes into \@Before method, 
because it will not work with JUnit Parameterized. I proposal to keep these 
codes in constructor. What do you think?


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