snuyanzin commented on code in PR #21410:
URL: https://github.com/apache/flink/pull/21410#discussion_r1047221724


##########
flink-state-backends/flink-statebackend-changelog/src/test/java/org/apache/flink/state/changelog/ChangelogStateBackendLoadingTest.java:
##########
@@ -229,14 +234,14 @@ public void testLoadingRocksDBStateBackend() throws 
Exception {
     }
 
     @Test
-    public void testEnableChangelogStateBackendInStreamExecutionEnvironment() 
throws Exception {
+    void testEnableChangelogStateBackendInStreamExecutionEnvironment() throws 
Exception {
         StreamExecutionEnvironment env = getEnvironment();
         assertStateBackendAndChangelogInEnvironmentAndStreamGraphAndJobGraph(
                 env, TernaryBoolean.UNDEFINED, null);
 
         // set back and force
         env.setStateBackend(new MemoryStateBackend());
-        assertTrue(env.getStateBackend() instanceof MemoryStateBackend);
+        assertThat(env.getStateBackend() instanceof 
MemoryStateBackend).isTrue();

Review Comment:
   ```suggestion
           
assertThat(env.getStateBackend()).isInstanceOf(MemoryStateBackend.class);
   ```
   could be simplified



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