diff --git a/generators/chipyard/src/test/scala/clocking/SimplePllConfigurationSpec.scala b/generators/chipyard/src/test/scala/clocking/SimplePllConfigurationSpec.scala
index 0abe7c50..d80aafc1 100644
--- a/generators/chipyard/src/test/scala/clocking/SimplePllConfigurationSpec.scala
+++ b/generators/chipyard/src/test/scala/clocking/SimplePllConfigurationSpec.scala
@@ -3,7 +3,7 @@ package chipyard.clocking
 
 import freechips.rocketchip.prci._
 
-class SimplePllConfigurationSpec extends org.scalatest.FlatSpec {
+class SimplePllConfigurationSpec extends org.scalatest.flatspec.AnyFlatSpec {
 
     def genConf(freqMHz: Iterable[Double]): SimplePllConfiguration = new SimplePllConfiguration(
       "testPLL",