diff --git a/llvm/test/lit.cfg b/llvm/test/lit.cfg
index 3f710debf23a..b77f892d4d92 100644
--- a/llvm/test/lit.cfg
+++ b/llvm/test/lit.cfg
@@ -374,6 +374,10 @@ if config.target_triple:
 if config.host_triple == config.target_triple:
     config.available_features.add("native")
 
+# Not set for targeting tls-incapable targets.
+if not re.match(r'.*-cygwin$', config.target_triple):
+    config.available_features.add('tls')
+
 import subprocess
 
 def have_ld_plugin_support():