diff --git a/src/main/scala/rocketchip/RocketTestSuite.scala b/src/main/scala/rocketchip/RocketTestSuite.scala
index 27a4522c..cf8cfec4 100644
--- a/src/main/scala/rocketchip/RocketTestSuite.scala
+++ b/src/main/scala/rocketchip/RocketTestSuite.scala
@@ -172,7 +172,7 @@ object DefaultTestSuites {
   val emptyBmarks = new BenchmarkTestSuite("empty",
     "$(RISCV)/riscv64-unknown-elf/share/riscv-tests/benchmarks", LinkedHashSet.empty)
 
-  val singleRegression = new RegressionTestSuite(LinkedHashSet("rv64iu-p-simple"))
+  val singleRegression = new RegressionTestSuite(LinkedHashSet("rv64ui-p-simple"))
 
   val mtBmarks = new BenchmarkTestSuite("mt", "$(RISCV)/riscv64-unknown-elf/share/riscv-tests/mt",
     LinkedHashSet(((0 to 4).map("vvadd"+_) ++