diff --git a/java/java-impl/src/com/intellij/codeInspection/ex/GlobalJavaInspectionContextImpl.java b/java/java-impl/src/com/intellij/codeInspection/ex/GlobalJavaInspectionContextImpl.java
index aff69ec85da9..b3aed0603150 100644
--- a/java/java-impl/src/com/intellij/codeInspection/ex/GlobalJavaInspectionContextImpl.java
+++ b/java/java-impl/src/com/intellij/codeInspection/ex/GlobalJavaInspectionContextImpl.java
@@ -194,7 +194,7 @@ public class GlobalJavaInspectionContextImpl extends GlobalJavaInspectionContext
     final SearchScope searchScope = new GlobalSearchScope(refManager.getProject()) {
       @Override
       public boolean contains(@NotNull VirtualFile file) {
-        return !scope.contains(file) || file.getFileType() != StdFileTypes.JAVA;
+        return scope != null && !scope.contains(file) || file.getFileType() != StdFileTypes.JAVA;
       }
 
       @Override
@@ -394,7 +394,7 @@ public class GlobalJavaInspectionContextImpl extends GlobalJavaInspectionContext
       @Override
       public boolean execute(PsiReference reference) {
         AnalysisScope scope = context.getRefManager().getScope();
-        if (scope.contains(reference.getElement()) && reference.getElement().getLanguage() == StdLanguages.JAVA ||
+        if (scope != null && scope.contains(reference.getElement()) && reference.getElement().getLanguage() == StdLanguages.JAVA ||
             PsiTreeUtil.getParentOfType(reference.getElement(), PsiDocComment.class) != null) {
           return true;
         }
diff --git a/java/java-impl/src/com/intellij/codeInspection/unusedParameters/UnusedParametersInspection.java b/java/java-impl/src/com/intellij/codeInspection/unusedParameters/UnusedParametersInspection.java
index c33d0d68b8cb..bb97f5cd78d5 100644
--- a/java/java-impl/src/com/intellij/codeInspection/unusedParameters/UnusedParametersInspection.java
+++ b/java/java-impl/src/com/intellij/codeInspection/unusedParameters/UnusedParametersInspection.java
@@ -132,7 +132,7 @@ public class UnusedParametersInspection extends GlobalJavaBatchInspectionTool {
                   int idx = refParameter.getIndex();
                   final boolean[] found = {false};
                   for (int i = 0; i < derived.length && !found[0]; i++) {
-                    if (!scope.contains(derived[i])) {
+                    if (scope == null || !scope.contains(derived[i])) {
                       final PsiParameter[] parameters = derived[i].getParameterList().getParameters();
                       if (parameters.length >= idx) continue;
                       PsiParameter psiParameter = parameters[idx];
diff --git a/platform/analysis-api/src/com/intellij/codeInspection/reference/RefManager.java b/platform/analysis-api/src/com/intellij/codeInspection/reference/RefManager.java
index 6f0a3c24e523..b46352670030 100644
--- a/platform/analysis-api/src/com/intellij/codeInspection/reference/RefManager.java
+++ b/platform/analysis-api/src/com/intellij/codeInspection/reference/RefManager.java
@@ -47,6 +47,7 @@ public abstract class RefManager {
    *
    * @return the analysis scope.
    */
+  @Nullable
   public abstract AnalysisScope getScope();
 
   /**
diff --git a/platform/analysis-impl/src/com/intellij/codeInspection/reference/RefManagerImpl.java b/platform/analysis-impl/src/com/intellij/codeInspection/reference/RefManagerImpl.java
index 0fbd048f4929..f31e44e96e2c 100644
--- a/platform/analysis-impl/src/com/intellij/codeInspection/reference/RefManagerImpl.java
+++ b/platform/analysis-impl/src/com/intellij/codeInspection/reference/RefManagerImpl.java
@@ -149,6 +149,7 @@ public class RefManagerImpl extends RefManager {
     }
   }
 
+  @Nullable
   @Override
   public AnalysisScope getScope() {
     return myScope;
@@ -304,7 +305,9 @@ public class RefManagerImpl extends RefManager {
     if (!myDeclarationsFound) {
       long before = System.currentTimeMillis();
       final AnalysisScope scope = getScope();
-      scope.accept(myProjectIterator);
+      if (scope != null) {
+        scope.accept(myProjectIterator);
+      }
       myDeclarationsFound = true;
 
       LOG.info("Total duration of processing project usages:" + (System.currentTimeMillis() - before));