diff --git a/platform/platform-tests/testSrc/com/intellij/openapi/vfs/VfsUtilTest.java b/platform/platform-tests/testSrc/com/intellij/openapi/vfs/VfsUtilTest.java
index abb1ca5d3393..f07e350bb700 100644
--- a/platform/platform-tests/testSrc/com/intellij/openapi/vfs/VfsUtilTest.java
+++ b/platform/platform-tests/testSrc/com/intellij/openapi/vfs/VfsUtilTest.java
@@ -49,7 +49,8 @@ import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Consumer;
 
-import static com.intellij.testFramework.UsefulTestCase.*;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.*;
 
 public class VfsUtilTest extends BareTestFixtureTestCase {
   @Rule public TempDirectory myTempDir = new TempDirectory();
@@ -108,7 +109,7 @@ public class VfsUtilTest extends BareTestFixtureTestCase {
     VirtualFile child = vDir.findChild(" ");
     assertNull(child);
 
-    assertEmpty(vDir.getChildren());
+    assertThat(vDir.getChildren()).isEmpty();
   }
 
   @Test
@@ -382,13 +383,13 @@ public class VfsUtilTest extends BareTestFixtureTestCase {
       assertTrue(dir2.mkdirs());
 
       VirtualFile vDir = VfsUtil.findFileByIoFile(tempDir, true);
-      assertSize(2, vDir.getChildren());
+      assertThat(vDir.getChildren()).hasSize(2);
       VirtualFile vDir1 = vDir.getChildren()[0];
       VirtualFile vDir2 = vDir.getChildren()[1];
       assertEquals(dir1.getName(), vDir1.getName());
 
-      assertEmpty(vDir1.getChildren());
-      assertEmpty(vDir2.getChildren());
+      assertThat(vDir1.getChildren()).isEmpty();
+      assertThat(vDir2.getChildren()).isEmpty();
 
       assertTrue(new File(dir1, "a.txt").createNewFile());
       assertTrue(new File(dir2, "a.txt").createNewFile());
@@ -409,7 +410,7 @@ public class VfsUtilTest extends BareTestFixtureTestCase {
           assertFalse(ApplicationManager.getApplication().isDispatchThread());
 
           vDir2.refresh(false, true, () -> log.add("modal finished"));
-          assertSize(1, vDir2.getChildren());
+          assertThat(vDir2.getChildren()).hasSize(1);
         }
       }));
 
@@ -418,9 +419,9 @@ public class VfsUtilTest extends BareTestFixtureTestCase {
         UIUtil.dispatchAllInvocationEvents();
       }
 
-      assertSize(1, vDir1.getChildren());
-      assertSize(1, vDir2.getChildren());
-      assertOrderedEquals(log, "modal finished", "non-modal finished");
+      assertThat(vDir1.getChildren()).hasSize(1);
+      assertThat(vDir2.getChildren()).hasSize(1);
+      assertThat(log).containsExactly("modal finished", "non-modal finished");
     });
   }
 }
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