diff --git a/clang-tools-extra/clangd/ParsedAST.cpp b/clang-tools-extra/clangd/ParsedAST.cpp
--- a/clang-tools-extra/clangd/ParsedAST.cpp
+++ b/clang-tools-extra/clangd/ParsedAST.cpp
@@ -473,7 +473,7 @@
           if (IsInsideMainFile && CTContext->shouldSuppressDiagnostic(
                                       DiagLevel, Info, TidySuppressedErrors,
                                       /*AllowIO=*/false,
-                                      /*EnableNolintBlocks=*/false)) {
+                                      /*EnableNolintBlocks=*/true)) {
             // FIXME: should we expose the suppression error (invalid use of
             // NOLINT comments)?
             return DiagnosticsEngine::Ignored;
diff --git a/clang-tools-extra/clangd/unittests/DiagnosticsTests.cpp b/clang-tools-extra/clangd/unittests/DiagnosticsTests.cpp
--- a/clang-tools-extra/clangd/unittests/DiagnosticsTests.cpp
+++ b/clang-tools-extra/clangd/unittests/DiagnosticsTests.cpp
@@ -477,9 +477,8 @@
       #define BAD2 BAD
       double h = BAD2;  // NOLINT
       // NOLINTBEGIN
-      // FIXME: re-enable when NOLINTBEGIN suppresss block is enabled in clangd.
-      // double x = BAD2;
-      // double y = BAD2;
+      double x = BAD2;
+      double y = BAD2;
       // NOLINTEND
 
       // verify no crashes on unmatched nolints.