diff --git a/clang-tools-extra/clangd/unittests/PreambleTests.cpp b/clang-tools-extra/clangd/unittests/PreambleTests.cpp
--- a/clang-tools-extra/clangd/unittests/PreambleTests.cpp
+++ b/clang-tools-extra/clangd/unittests/PreambleTests.cpp
@@ -230,8 +230,8 @@
 TEST(PreamblePatchTest, Define) {
   // BAR should be defined while parsing the AST.
   struct {
-    llvm::StringLiteral Contents;
-    llvm::StringLiteral ExpectedPatch;
+    const char *const Contents;
+    const char *const ExpectedPatch;
   } Cases[] = {
       {
           R"cpp(
@@ -270,7 +270,7 @@
     SCOPED_TRACE(Case.Contents);
     Annotations Modified(Case.Contents);
     EXPECT_THAT(getPreamblePatch("", Modified.code()),
-                MatchesRegex(Case.ExpectedPatch.str()));
+                MatchesRegex(Case.ExpectedPatch));
 
     auto AST = createPatchedAST("", Modified.code());
     ASSERT_TRUE(AST);
@@ -304,8 +304,8 @@
 
 TEST(PreamblePatchTest, LocateMacroAtWorks) {
   struct {
-    llvm::StringLiteral Baseline;
-    llvm::StringLiteral Modified;
+    const char *const Baseline;
+    const char *const Modified;
   } Cases[] = {
       // Addition of new directive
       {
@@ -417,8 +417,8 @@
 
 TEST(PreamblePatchTest, RefsToMacros) {
   struct {
-    llvm::StringLiteral Baseline;
-    llvm::StringLiteral Modified;
+    const char *const Baseline;
+    const char *const Modified;
   } Cases[] = {
       // Newly added
       {
@@ -491,8 +491,8 @@
 
 TEST(PreamblePatch, ModifiedBounds) {
   struct {
-    llvm::StringLiteral Baseline;
-    llvm::StringLiteral Modified;
+    const char *const Baseline;
+    const char *const Modified;
   } Cases[] = {
       // Size increased
       {