diff --git a/clang-tools-extra/clangd/unittests/FileIndexTests.cpp b/clang-tools-extra/clangd/unittests/FileIndexTests.cpp
index 5b429d61a9e4..a88900c47884 100644
--- a/clang-tools-extra/clangd/unittests/FileIndexTests.cpp
+++ b/clang-tools-extra/clangd/unittests/FileIndexTests.cpp
@@ -736,7 +736,8 @@ TEST(FileIndexTest, MacrosFromMainFile) {
   auto AST = TU.build();
   Idx.updateMain(testPath(TU.Filename), AST);
 
-  auto &FooSymbol = findSymbol(runFuzzyFind(Idx, ""), "FOO");
+  auto Slab = runFuzzyFind(Idx, "");
+  auto &FooSymbol = findSymbol(Slab, "FOO");
   EXPECT_TRUE(FooSymbol.Flags & Symbol::IndexedForCodeCompletion);
 }