diff --git a/test/lit.cfg.py b/test/lit.cfg.py
index 3c154c5899e..4200dd57dc4 100644
--- a/test/lit.cfg.py
+++ b/test/lit.cfg.py
@@ -278,7 +278,10 @@ if have_ld_plugin_support():
 
 
 def have_ld64_plugin_support():
-    if not config.llvm_tool_lto_build or config.ld64_executable == '':
+    if not os.path.exists(os.path.join(config.llvm_shlib_dir, 'libLTO' + config.llvm_shlib_ext)):
+        return False
+
+    if config.ld64_executable == '':
         return False
 
     ld_cmd = subprocess.Popen(
diff --git a/test/lit.site.cfg.py.in b/test/lit.site.cfg.py.in
index 6592b3c450c..b8bfc1bd364 100644
--- a/test/lit.site.cfg.py.in
+++ b/test/lit.site.cfg.py.in
@@ -15,7 +15,6 @@ config.lit_tools_dir = "@LLVM_LIT_TOOLS_DIR@"
 config.python_executable = "@PYTHON_EXECUTABLE@"
 config.gold_executable = "@GOLD_EXECUTABLE@"
 config.ld64_executable = "@LD64_EXECUTABLE@"
-config.llvm_tool_lto_build = @LLVM_TOOL_LTO_BUILD@
 config.ocamlfind_executable = "@OCAMLFIND@"
 config.have_ocamlopt = @HAVE_OCAMLOPT@
 config.have_ocaml_ounit = @HAVE_OCAML_OUNIT@
diff --git a/utils/gn/secondary/llvm/test/BUILD.gn b/utils/gn/secondary/llvm/test/BUILD.gn
index b6f75746781..2671982a7bb 100644
--- a/utils/gn/secondary/llvm/test/BUILD.gn
+++ b/utils/gn/secondary/llvm/test/BUILD.gn
@@ -59,7 +59,6 @@ write_lit_config("lit_site_cfg") {
     "LLVM_LINK_LLVM_DYLIB=0",
     "LLVM_LIT_TOOLS_DIR=",  # Intentionally empty, matches cmake build.
     "LLVM_NATIVE_ARCH=$native_target",
-    "LLVM_TOOL_LTO_BUILD=1",  # The GN build always builds //llvm/tools/lto.
     "LLVM_USE_INTEL_JITEVENTS=0",
     "LLVM_USE_SANITIZER=",
     "PYTHON_EXECUTABLE=$python_path",