diff --git a/clang/unittests/AST/ASTImporterTest.cpp b/clang/unittests/AST/ASTImporterTest.cpp
index a390b49d1641ba..36003957d2e1a5 100644
--- a/clang/unittests/AST/ASTImporterTest.cpp
+++ b/clang/unittests/AST/ASTImporterTest.cpp
@@ -6023,10 +6023,6 @@ struct SourceWithCompletedTagList : clang::ExternalASTSource {
     Record->completeDefinition();
     CompletedTags.push_back(Tag);
   }
-  void
-  FindExternalLexicalDecls(const DeclContext *DC,
-                           llvm::function_ref<bool(Decl::Kind)> IsKindWeWant,
-                           SmallVectorImpl<Decl *> &Result) override {}
 };
 
 TEST_P(ImportWithExternalSource, CompleteRecordBeforeImporting) {