diff --git a/lib/tests/misc.nix b/lib/tests/misc.nix
index 916994152754..f257d9953fc3 100644
--- a/lib/tests/misc.nix
+++ b/lib/tests/misc.nix
@@ -559,6 +559,10 @@ runTests {
     ];
     expected = "a\nb\nc\n";
   };
+  testConcatLinesEmpty = {
+    expr = concatLines [ ];
+    expected = "";
+  };
 
   testMakeIncludePathWithPkgs = {
     expr = (