diff --git a/java/java-analysis-impl/src/com/intellij/codeInspection/nullable/NullableStuffInspectionBase.java b/java/java-analysis-impl/src/com/intellij/codeInspection/nullable/NullableStuffInspectionBase.java
index 295726cb3f40..41a5ffb17ac3 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInspection/nullable/NullableStuffInspectionBase.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInspection/nullable/NullableStuffInspectionBase.java
@@ -557,16 +557,14 @@ public class NullableStuffInspectionBase extends AbstractBaseJavaLocalInspection
       context = JavaTypeNullabilityUtil.getNullabilityConflictInAssignment(expectedType, actualType,
                                                                            REPORT_NOT_NULL_TO_NULLABLE_CONFLICTS_IN_ASSIGNMENTS);
     JavaTypeNullabilityUtil.NullabilityConflict conflict = context.nullabilityConflict();
-    String messageKey;
-    switch (conflict) {
-      case UNKNOWN -> {
-        return false;
-      }
-      case NOT_NULL_TO_NULL -> messageKey = problem.notNullToNullProblem();
-      case NULL_TO_NOT_NULL -> messageKey = problem.nullToNotNullProblem();
-      case COMPLEX -> messageKey = problem.complexProblem();
-      default -> throw new IllegalStateException("Unexpected value: " + conflict);
-    }
+    String messageKey = switch (conflict) {
+      case UNKNOWN -> null;
+      case NOT_NULL_TO_NULL -> problem.notNullToNullProblem();
+      case NULL_TO_NOT_NULL -> problem.nullToNotNullProblem();
+      case COMPLEX -> problem.complexProblem();
+    };
+
+    if (messageKey == null) return false;
 
     reportProblem(holder, errorElement, LocalQuickFix.EMPTY_ARRAY,
                   messageKey, new Object[]{""},
diff --git a/java/java-tests/testSrc/com/intellij/java/codeInspection/JSpecifyFilteredAnnotationTest.java b/java/java-tests/testSrc/com/intellij/java/codeInspection/JSpecifyFilteredAnnotationTest.java
index 769b89305223..2f20d349e75a 100644
--- a/java/java-tests/testSrc/com/intellij/java/codeInspection/JSpecifyFilteredAnnotationTest.java
+++ b/java/java-tests/testSrc/com/intellij/java/codeInspection/JSpecifyFilteredAnnotationTest.java
@@ -392,56 +392,6 @@ public class JSpecifyFilteredAnnotationTest extends LightJavaCodeInsightFixtureT
     }
   }
 
-  private static class CallWithParameterWithNestedGenericsFilter implements ErrorFilter {
-
-    @Override
-    public boolean filterActual(@NotNull PsiFile file,
-                                @NotNull String strippedText,
-                                int lineNumber,
-                                int startLineOffset,
-                                @NotNull String errorMessage) {
-      if (!errorMessage.contains("jspecify_nullness_mismatch")) return false;
-      PsiElement element = findElement(file, strippedText, lineNumber, startLineOffset);
-      PsiExpressionStatement statement = PsiTreeUtil.getParentOfType(element, PsiExpressionStatement.class, true);
-      if (statement == null) return false;
-      PsiExpression expression = statement.getExpression();
-      if (!(expression instanceof PsiCallExpression callExpression)) return false;
-      PsiMethod method = callExpression.resolveMethod();
-      if (method == null) return false;
-      return ContainerUtil.exists(method.getParameterList().getParameters(),
-                                  parameter -> parameter.getType() instanceof PsiClassType classType && classType.hasParameters());
-    }
-
-    @Override
-    public boolean filterExpected(@NotNull PsiElement psiElement, @NotNull String errorMessage) {
-      //filter only actual file
-      return false;
-    }
-  }
-
-  private static class VariableWithNestedGenericsFilter implements ErrorFilter {
-
-    @Override
-    public boolean filterActual(@NotNull PsiFile file,
-                                @NotNull String strippedText,
-                                int lineNumber,
-                                int startLineOffset,
-                                @NotNull String errorMessage) {
-      if (!errorMessage.contains("jspecify_nullness_mismatch")) return false;
-      PsiElement element = findElement(file, strippedText, lineNumber, startLineOffset);
-      PsiVariable variable = PsiTreeUtil.getParentOfType(element, PsiVariable.class, true);
-      if (variable == null) return false;
-      return variable.getType() instanceof PsiClassType classType && classType.hasParameters();
-    }
-
-    @Override
-    public boolean filterExpected(@NotNull PsiElement psiElement, @NotNull String errorMessage) {
-      //filter only actual file
-      return false;
-    }
-  }
-
-
   private static class SkipIndividuallyFilter implements ErrorFilter {
     private final Set<Pair<String, Integer>> places;
     private final Set<Pair<String, Integer>> unusedPlaces;