diff --git a/llvm/utils/gn/secondary/llvm/unittests/CodeGen/BUILD.gn b/llvm/utils/gn/secondary/llvm/unittests/CodeGen/BUILD.gn
index 6879a92e7769c..e40a8ee04dd38 100644
--- a/llvm/utils/gn/secondary/llvm/unittests/CodeGen/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/unittests/CodeGen/BUILD.gn
@@ -40,6 +40,7 @@ unittest("CodeGenTests") {
     "MachineOperandTest.cpp",
     "PassManagerTest.cpp",
     "RegAllocScoreTest.cpp",
+    "RegisterTest.cpp",
     "ScalableVectorMVTsTest.cpp",
     "SchedBoundary.cpp",
     "SelectionDAGAddressAnalysisTest.cpp",