diff --git a/platform/lang-api/src/com/intellij/psi/codeStyle/LanguageCodeStyleSettingsProvider.java b/platform/lang-api/src/com/intellij/psi/codeStyle/LanguageCodeStyleSettingsProvider.java
index b2ded58919f7..9604f35e52f9 100644
--- a/platform/lang-api/src/com/intellij/psi/codeStyle/LanguageCodeStyleSettingsProvider.java
+++ b/platform/lang-api/src/com/intellij/psi/codeStyle/LanguageCodeStyleSettingsProvider.java
@@ -74,10 +74,14 @@ public abstract class LanguageCodeStyleSettingsProvider {
 
   /**
    * Allows to customize PSI file creation for a language settings preview panel.
+   * <p>
+   * <b>IMPORTANT</b>: The created file must be a non-physical one with PSI events disabled. For more information see
+   * {@link com.intellij.psi.PsiFileFactory#createFileFromText(String, Language, CharSequence, boolean, boolean)} where
+   * {@code eventSystemEnabled} parameter must be {@code false}
    *
    * @param project current project
    * @param text    code sample to demonstrate formatting settings (see {@link #getCodeSample(LanguageCodeStyleSettingsProvider.SettingsType)}
-   * @return a PSI file instance with given text, or null for use
+   * @return a PSI file instance with given text, or null for default implementation using provider's language.
    */
   @Nullable
   public PsiFile createFileFromText(final Project project, final String text) {
diff --git a/platform/lang-impl/src/com/intellij/application/options/CodeStyleAbstractPanel.java b/platform/lang-impl/src/com/intellij/application/options/CodeStyleAbstractPanel.java
index 616dc34ab789..c59a5221f8e0 100644
--- a/platform/lang-impl/src/com/intellij/application/options/CodeStyleAbstractPanel.java
+++ b/platform/lang-impl/src/com/intellij/application/options/CodeStyleAbstractPanel.java
@@ -308,8 +308,16 @@ public abstract class CodeStyleAbstractPanel implements Disposable {
   protected PsiFile createFileFromText(Project project, String text) {
     Language language = getDefaultLanguage();
     if (language != null) {
-      final PsiFile file = LanguageCodeStyleSettingsProvider.createFileFromText(language, project, text);
-      if (file != null) return file;
+      LanguageCodeStyleSettingsProvider provider = LanguageCodeStyleSettingsProvider.forLanguage(language);
+      if (provider != null) {
+        final PsiFile file = provider.createFileFromText(project, text);
+        if (file != null) {
+          if (file.isPhysical()) {
+            LOG.error(provider.getClass() + " creates a physical file with PSI events enabled");
+          }
+          return file;
+        }
+      }
     }
     return PsiFileFactory.getInstance(project).createFileFromText(
       "a." + getFileExt(), getFileType(), text, LocalTimeCounter.currentTime(), false
diff --git a/platform/platform-tests/testSrc/com/intellij/ide/codeStyleSettings/CodeSamplesCorrectnessTest.java b/platform/platform-tests/testSrc/com/intellij/ide/codeStyleSettings/CodeSamplesCorrectnessTest.java
index 65baedbe0de0..730e4600f173 100644
--- a/platform/platform-tests/testSrc/com/intellij/ide/codeStyleSettings/CodeSamplesCorrectnessTest.java
+++ b/platform/platform-tests/testSrc/com/intellij/ide/codeStyleSettings/CodeSamplesCorrectnessTest.java
@@ -23,7 +23,6 @@ import com.intellij.psi.PsiFile;
 import com.intellij.psi.codeStyle.LanguageCodeStyleSettingsProvider;
 import com.intellij.psi.util.PsiTreeUtil;
 import com.intellij.testFramework.fixtures.LightPlatformCodeInsightFixtureTestCase;
-import com.intellij.util.Function;
 import com.intellij.util.containers.ContainerUtil;
 import org.jetbrains.annotations.NotNull;
 import org.junit.Assert;
@@ -45,6 +44,19 @@ public class CodeSamplesCorrectnessTest extends LightPlatformCodeInsightFixtureT
     mySettingValues = SettingsType.values();
   }
 
+  public void testNonPhysicalFiles() {
+    LanguageCodeStyleSettingsProvider[] providers = LanguageCodeStyleSettingsProvider.EP_NAME.getExtensions();
+    for (LanguageCodeStyleSettingsProvider provider : providers) {
+      List<CodeSampleInfo> samplesToTest = getSamplesToTest(provider);
+      for (CodeSampleInfo sampleInfo : samplesToTest) {
+        PsiFile file = provider.createFileFromText(getProject(), sampleInfo.codeSample);
+        if (file != null) {
+          assertFalse(provider.getClass() + " must not create a physical file with psi events enabled", file.isPhysical());
+        }
+      }
+    }
+  }
+
   public void testAllCodeStylePreviewSamplesValid() {
     LanguageCodeStyleSettingsProvider[] providers = LanguageCodeStyleSettingsProvider.EP_NAME.getExtensions();