diff --git a/build.sbt b/build.sbt
index 91d647e57d4..083c05004f1 100644
--- a/build.sbt
+++ b/build.sbt
@@ -105,7 +105,7 @@ lazy val chiselSettings = Seq (
 // An explicit dependency on junit seems to alleviate this.
   libraryDependencies ++= Seq(
     "junit" % "junit" % "4.13" % "test",
-    "org.scalatest" %% "scalatest" % "3.1.0" % "test",
+    "org.scalatest" %% "scalatest" % "3.1.1" % "test",
     "org.scalatestplus" %% "scalacheck-1-14" % "3.1.0.1" % "test",
     "com.github.scopt" %% "scopt" % "3.7.1"
   ),
diff --git a/build.sc b/build.sc
index 52a6aeda9e5..d1e2728977a 100644
--- a/build.sc
+++ b/build.sc
@@ -97,7 +97,7 @@ class chisel3CrossModule(crossVersionValue: String) extends CommonModule with Pu
     }
 
     def ivyDeps = Agg(
-      ivy"org.scalatest::scalatest:3.1.0",
+      ivy"org.scalatest::scalatest:3.1.1",
       ivy"org.scalatestplus::scalacheck-1-14:3.1.0.1",
       ivy"com.github.scopt::scopt:3.7.1"
     ) ++ ivyCrossDeps
diff --git a/src/test/scala/chiselTests/ChiselSpec.scala b/src/test/scala/chiselTests/ChiselSpec.scala
index 31d6d322ea6..801dbac265d 100644
--- a/src/test/scala/chiselTests/ChiselSpec.scala
+++ b/src/test/scala/chiselTests/ChiselSpec.scala
@@ -4,6 +4,7 @@ package chiselTests
 
 import org.scalatest._
 import org.scalatest.prop._
+import org.scalatest.flatspec.AnyFlatSpec
 import org.scalacheck._
 import chisel3._
 import chisel3.testers._
@@ -94,7 +95,7 @@ trait ChiselRunners extends Assertions with BackendCompilationUtilities {
 }
 
 /** Spec base class for BDD-style testers. */
-abstract class ChiselFlatSpec extends FlatSpec with ChiselRunners with Matchers
+abstract class ChiselFlatSpec extends AnyFlatSpec with ChiselRunners with Matchers
 
 class ChiselTestUtilitiesSpec extends ChiselFlatSpec {
   import org.scalatest.exceptions.TestFailedException
diff --git a/src/test/scala/chiselTests/stage/ChiselStageSpec.scala b/src/test/scala/chiselTests/stage/ChiselStageSpec.scala
index b14d79a1b85..a7a405f11dc 100644
--- a/src/test/scala/chiselTests/stage/ChiselStageSpec.scala
+++ b/src/test/scala/chiselTests/stage/ChiselStageSpec.scala
@@ -5,7 +5,8 @@ package chiselTests.stage
 import chisel3._
 import chisel3.stage.ChiselStage
 
-import org.scalatest.{FlatSpec, Matchers}
+import org.scalatest.flatspec.AnyFlatSpec
+import org.scalatest.matchers.should.Matchers
 
 object ChiselStageSpec {
 
@@ -18,7 +19,7 @@ object ChiselStageSpec {
 
 }
 
-class ChiselStageSpec extends FlatSpec with Matchers {
+class ChiselStageSpec extends AnyFlatSpec with Matchers {
 
   import ChiselStageSpec._