diff --git a/platform/platform-tests/testSrc/com/intellij/concurrency/JobUtilTest.java b/platform/platform-tests/testSrc/com/intellij/concurrency/JobUtilTest.java
index b75591c4ade0..ba89c989d908 100644
--- a/platform/platform-tests/testSrc/com/intellij/concurrency/JobUtilTest.java
+++ b/platform/platform-tests/testSrc/com/intellij/concurrency/JobUtilTest.java
@@ -59,7 +59,7 @@ public class JobUtilTest extends PlatformTestCase {
     long elapsed = System.currentTimeMillis() - start;
     int expected = 2 * (9950 + 50 * 1000) / JobSchedulerImpl.CORES_COUNT;
     String message = "Elapsed: " + elapsed + "; expected: " + expected;
-    System.out.println(message);
+    LOG.debug(message);
     assertTrue(message, elapsed < expected);
   }
 
@@ -119,7 +119,7 @@ public class JobUtilTest extends PlatformTestCase {
       });
       if (exception.get() != null) throw exception.get();
       long finish = System.currentTimeMillis();
-      System.out.println("Elapsed: "+(finish-start)+"ms");
+      LOG.debug("Elapsed: "+(finish-start)+"ms");
       assertEquals(list.size(), COUNT.get());
     }
   }
@@ -137,7 +137,7 @@ public class JobUtilTest extends PlatformTestCase {
         return true;
       });
       long finish = System.currentTimeMillis();
-      System.out.println("Elapsed: "+(finish-start)+"ms");
+      LOG.debug("Elapsed: "+(finish-start)+"ms");
       assertEquals(list.size()*list.size(), COUNT.get());
     }
   }
@@ -192,7 +192,7 @@ public class JobUtilTest extends PlatformTestCase {
       final List<Object> objects = Collections.nCopies(100000000, null);
       JobLauncher.getInstance().invokeConcurrentlyUnderProgress(objects, null, true, o -> {
         if (COUNT.incrementAndGet() == 100000) {
-          System.out.println("PCE");
+          LOG.debug("PCE");
           throw new MyException();
         }
         return true;
@@ -208,7 +208,7 @@ public class JobUtilTest extends PlatformTestCase {
     final List<Object> objects = Collections.nCopies(100000000, null);
     boolean success = JobLauncher.getInstance().invokeConcurrentlyUnderProgress(objects, null, true, o -> {
       if (COUNT.incrementAndGet() == 100000) {
-        System.out.println("PCE");
+        LOG.debug("PCE");
         return false;
       }
       return true;
@@ -240,7 +240,7 @@ public class JobUtilTest extends PlatformTestCase {
         success = JobLauncher.getInstance().invokeConcurrentlyUnderProgress(list, null, false, name -> {
           boolean nestedSuccess = JobLauncher.getInstance().invokeConcurrentlyUnderProgress(ilist, null, false, integer -> {
             if (busySleep(1) == 1000) {
-              System.out.println("PCE");
+              LOG.debug("PCE");
               throw new MyException();
             }
             return true;
@@ -253,7 +253,7 @@ public class JobUtilTest extends PlatformTestCase {
       catch (MyException ignored) {
       }
       long finish = System.currentTimeMillis();
-      System.out.println("Elapsed: "+(finish-start)+"ms");
+      LOG.debug("Elapsed: "+(finish-start)+"ms");
       //assertEquals(list.size()*list.size(), COUNT.get());
       assertFalse(success);
     }
@@ -306,7 +306,7 @@ public class JobUtilTest extends PlatformTestCase {
       return true;
     };
     for (int i=0; i<10/*0*/; i++) {
-      System.out.println("i = " + i);
+      LOG.debug("i = " + i);
       processorCalled.set(0);
       final ProgressIndicator indicator = new EmptyProgressIndicator();
       int N = 10000;
diff --git a/platform/platform-tests/testSrc/com/intellij/openapi/vfs/impl/VirtualFilePointerTest.java b/platform/platform-tests/testSrc/com/intellij/openapi/vfs/impl/VirtualFilePointerTest.java
index 2954be28b534..f64684569bb8 100644
--- a/platform/platform-tests/testSrc/com/intellij/openapi/vfs/impl/VirtualFilePointerTest.java
+++ b/platform/platform-tests/testSrc/com/intellij/openapi/vfs/impl/VirtualFilePointerTest.java
@@ -559,7 +559,7 @@ public class VirtualFilePointerTest extends PlatformTestCase {
       assertFalse(jarPointer.isValid());
       UIUtil.dispatchAllInvocationEvents();
     }
-    System.out.println("final i = " + i);
+    LOG.debug("final i = " + i);
   }
 
   private static void refreshVFS() {
@@ -966,7 +966,7 @@ public class VirtualFilePointerTest extends PlatformTestCase {
       if (exception !=null) throw exception;
       Disposer.dispose(disposable);
     }
-    System.out.println("final i = " + i);
+    LOG.debug("final i = " + i);
   }
 
   public void testGetChildrenMustIncreaseModificationCountIfFoundNewFile() throws Exception {
@@ -999,6 +999,6 @@ public class VirtualFilePointerTest extends PlatformTestCase {
         UIUtil.dispatchAllInvocationEvents();
       }
     }
-    System.out.println("final i = " + i);
+    LOG.debug("final i = " + i);
   }
 }
diff --git a/platform/platform-tests/testSrc/com/intellij/openapi/vfs/local/LocalFileSystemTest.java b/platform/platform-tests/testSrc/com/intellij/openapi/vfs/local/LocalFileSystemTest.java
index 6e068725e098..56cafcce7188 100644
--- a/platform/platform-tests/testSrc/com/intellij/openapi/vfs/local/LocalFileSystemTest.java
+++ b/platform/platform-tests/testSrc/com/intellij/openapi/vfs/local/LocalFileSystemTest.java
@@ -480,7 +480,7 @@ public class LocalFileSystemTest extends PlatformTestCase {
       fail("Copying a file into a '.' path should have failed");
     }
     catch (IOException e) {
-      System.out.println(e.getMessage());
+      e.printStackTrace();
     }
 
     topDir.refresh(false, true);
diff --git a/platform/platform-tests/testSrc/com/intellij/util/AlarmTest.java b/platform/platform-tests/testSrc/com/intellij/util/AlarmTest.java
index b80810eabb9a..4c3c8f2cfec4 100644
--- a/platform/platform-tests/testSrc/com/intellij/util/AlarmTest.java
+++ b/platform/platform-tests/testSrc/com/intellij/util/AlarmTest.java
@@ -107,7 +107,7 @@ public class AlarmTest extends PlatformTestCase {
       UIUtil.dispatchAllInvocationEvents();
     }
     Map<Thread, StackTraceElement[]> after = Thread.getAllStackTraces();
-    System.out.println("before: "+before.size()+"; after: "+after.size());
+    LOG.debug("before: "+before.size()+"; after: "+after.size());
     assertTrue(after.size() - before.size() < 10);
   }
 
@@ -163,7 +163,7 @@ public class AlarmTest extends PlatformTestCase {
     String s = sb.toString();
     long elapsed = System.currentTimeMillis() - start;
     if (elapsed > delay/2) {
-      System.out.println("No no no no this agent is so overloaded I quit");
+      System.err.println("No no no no this agent is so overloaded I quit");
       return;
     }
     assertEquals(2, alarm.getActiveRequestCount());