diff --git a/python/src/com/jetbrains/python/inspections/quickfix/UnresolvedReferenceAddParameterQuickFix.java b/python/src/com/jetbrains/python/inspections/quickfix/UnresolvedReferenceAddParameterQuickFix.java
index 875130675884..807ee7aae35d 100644
--- a/python/src/com/jetbrains/python/inspections/quickfix/UnresolvedReferenceAddParameterQuickFix.java
+++ b/python/src/com/jetbrains/python/inspections/quickfix/UnresolvedReferenceAddParameterQuickFix.java
@@ -1,7 +1,6 @@
 package com.jetbrains.python.inspections.quickfix;
 
 import com.intellij.codeInsight.CodeInsightUtilBase;
-import com.intellij.codeInsight.intention.HighPriorityAction;
 import com.intellij.codeInsight.template.TemplateBuilder;
 import com.intellij.codeInsight.template.TemplateBuilderFactory;
 import com.intellij.codeInspection.LocalQuickFix;
@@ -22,7 +21,7 @@ import org.jetbrains.annotations.NotNull;
  *
  * QuickFix to add parameter to unresolved reference
  */
-public class UnresolvedReferenceAddParameterQuickFix implements LocalQuickFix, HighPriorityAction {
+public class UnresolvedReferenceAddParameterQuickFix implements LocalQuickFix {
   private String myName;
   public UnresolvedReferenceAddParameterQuickFix(String name) {
     myName = name;
diff --git a/python/src/com/jetbrains/python/psi/search/PyProjectScopeBuilder.java b/python/src/com/jetbrains/python/psi/search/PyProjectScopeBuilder.java
index 87c048064306..201b383a206b 100644
--- a/python/src/com/jetbrains/python/psi/search/PyProjectScopeBuilder.java
+++ b/python/src/com/jetbrains/python/psi/search/PyProjectScopeBuilder.java
@@ -8,12 +8,14 @@ import com.intellij.openapi.projectRoots.Sdk;
 import com.intellij.openapi.roots.FileIndexFacade;
 import com.intellij.openapi.roots.OrderRootType;
 import com.intellij.openapi.roots.ProjectRootManager;
+import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.search.*;
 import com.jetbrains.python.sdk.PythonSdkType;
 import org.jetbrains.annotations.Nullable;
 
+import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -135,6 +137,27 @@ public class PyProjectScopeBuilder extends ProjectScopeBuilderImpl {
     return findLibDir(sdk.getRootProvider().getFiles(OrderRootType.CLASSES));
   }
 
+  public static VirtualFile findVirtualEnvLibDir(Sdk sdk) {
+    VirtualFile[] classVFiles = sdk.getRootProvider().getFiles(OrderRootType.CLASSES);
+    String homePath = sdk.getHomePath();
+    if (homePath != null) {
+      File root = PythonSdkType.getVirtualEnvRoot(homePath);
+      if (root != null) {
+        File libRoot = new File(root, "lib");
+        File[] versionRoots = libRoot.listFiles();
+        if (versionRoots != null && versionRoots.length == 1) {
+          libRoot = versionRoots[0];
+        }
+        for (VirtualFile file : classVFiles) {
+          if (FileUtil.pathsEqual(file.getPath(), libRoot.getPath())) {
+            return file;
+          }
+        }
+      }
+    }
+    return null;
+  }
+
   @Nullable
   private static VirtualFile findLibDir(VirtualFile[] files) {
     for (VirtualFile file : files) {
diff --git a/python/src/com/jetbrains/python/sdk/PythonSdkType.java b/python/src/com/jetbrains/python/sdk/PythonSdkType.java
index a7979c8352d8..e30b3cae9ff1 100644
--- a/python/src/com/jetbrains/python/sdk/PythonSdkType.java
+++ b/python/src/com/jetbrains/python/sdk/PythonSdkType.java
@@ -771,11 +771,11 @@ public class PythonSdkType extends SdkType {
     if (pythonSdk != null) {
       final VirtualFile libDir = PyProjectScopeBuilder.findLibDir(pythonSdk);
       if (libDir != null && VfsUtilCore.isAncestor(libDir, vFile, false)) {
-        final VirtualFile sitePackages = libDir.findChild(PyNames.SITE_PACKAGES);
-        if (sitePackages != null && VfsUtilCore.isAncestor(sitePackages, vFile, false)) {
-          return false;
-        }
-        return true;
+        return isNotSitePackages(vFile, libDir);
+      }
+      final VirtualFile venvLibDir = PyProjectScopeBuilder.findVirtualEnvLibDir(pythonSdk);
+      if (venvLibDir != null && VfsUtilCore.isAncestor(venvLibDir, vFile, false)) {
+        return isNotSitePackages(vFile, venvLibDir);
       }
       final VirtualFile skeletonsDir = findSkeletonsDir(pythonSdk);
       if (skeletonsDir != null &&
@@ -786,6 +786,14 @@ public class PythonSdkType extends SdkType {
     return false;
   }
 
+  private static boolean isNotSitePackages(VirtualFile vFile, VirtualFile libDir) {
+    final VirtualFile sitePackages = libDir.findChild(PyNames.SITE_PACKAGES);
+    if (sitePackages != null && VfsUtilCore.isAncestor(sitePackages, vFile, false)) {
+      return false;
+    }
+    return true;
+  }
+
   @Nullable
   public static Sdk findPython2Sdk(@Nullable Module module) {
     Sdk moduleSDK = findPythonSdk(module);
diff --git a/python/src/com/jetbrains/python/validation/Pep8ExternalAnnotator.java b/python/src/com/jetbrains/python/validation/Pep8ExternalAnnotator.java
index 4fed279eb99f..43525e5c0185 100644
--- a/python/src/com/jetbrains/python/validation/Pep8ExternalAnnotator.java
+++ b/python/src/com/jetbrains/python/validation/Pep8ExternalAnnotator.java
@@ -17,6 +17,7 @@ import com.intellij.openapi.project.Project;
 import com.intellij.openapi.projectRoots.Sdk;
 import com.intellij.openapi.util.Computable;
 import com.intellij.openapi.util.text.StringUtil;
+import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.profile.codeInspection.InspectionProjectProfileManager;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiFile;
@@ -24,6 +25,7 @@ import com.intellij.psi.PsiWhiteSpace;
 import com.intellij.psi.codeStyle.CodeStyleSettingsManager;
 import com.intellij.util.ArrayUtil;
 import com.intellij.util.IncorrectOperationException;
+import com.jetbrains.python.PythonFileType;
 import com.jetbrains.python.PythonHelpersLocator;
 import com.jetbrains.python.inspections.PyPep8Inspection;
 import com.jetbrains.python.inspections.quickfix.ReformatFix;
@@ -79,6 +81,10 @@ public class Pep8ExternalAnnotator extends ExternalAnnotator<Pep8ExternalAnnotat
   @Nullable
   @Override
   public State collectionInformation(@NotNull PsiFile file) {
+    VirtualFile vFile = file.getVirtualFile();
+    if (vFile == null || vFile.getFileType() != PythonFileType.INSTANCE) {
+      return null;
+    }
     Sdk sdk = PythonSdkType.findPythonSdk(ModuleUtilCore.findModuleForPsiElement(file));
 
     if (PythonSdkType.isRemote(sdk)) {