diff --git a/build.sbt b/build.sbt
index 7ec8bef8..3a0ad549 100644
--- a/build.sbt
+++ b/build.sbt
@@ -24,11 +24,16 @@ def compilerOptions(scalaVersion: String): Seq[String] =
   ) ++
   (CrossVersion.partialVersion(scalaVersion) match {
     case Some((2, _)) => Seq(
-      "-Xsource:3", "-Xlint",
+      "-Xlint",
       // these are too annoying when crossbuilding
       "-Wconf:cat=unused-nowarn:s",
     )
     case _ => Seq()
+  }) ++
+  (CrossVersion.partialVersion(scalaVersion) match {
+    case Some((2, 12)) => Seq("-Xsource:3")
+    case Some((2, 13)) => Seq("-Xsource:3-cross")
+    case _ => Seq()
   })
 
 // Useful to self-test releases
@@ -42,7 +47,7 @@ commands += Command.command("testStaging") { state =>
 
 // Keep in sync with TestCli
 val scala212 = "2.12.19"
-val scala213 = "2.13.12"
+val scala213 = "2.13.13"
 val scala3 = "3.3.3"
 
 val root = project.in(file(".")).settings(
diff --git a/functional-tests/src/main/scala/com/typesafe/tools/mima/lib/TestCli.scala b/functional-tests/src/main/scala/com/typesafe/tools/mima/lib/TestCli.scala
index 8d8ef3e7..9b88e85f 100644
--- a/functional-tests/src/main/scala/com/typesafe/tools/mima/lib/TestCli.scala
+++ b/functional-tests/src/main/scala/com/typesafe/tools/mima/lib/TestCli.scala
@@ -11,7 +11,7 @@ object TestCli {
   // Keep in sync with build.sbt
   val scala211 = "2.11.12"
   val scala212 = "2.12.19"
-  val scala213 = "2.13.12"
+  val scala213 = "2.13.13"
   val scala3   = "3.3.3"
   val hostScalaVersion = StdLibProps.scalaPropOrNone("maven.version.number").get
   val allScalaVersions = List(scala211, scala212, scala213, scala3)
diff --git a/functional-tests/src/test/case-class-private-constructor-changes-ok/scalac-options-2.13.txt b/functional-tests/src/test/case-class-private-constructor-changes-ok/scalac-options-2.13.txt
index aea506b6..93c192a7 100644
--- a/functional-tests/src/test/case-class-private-constructor-changes-ok/scalac-options-2.13.txt
+++ b/functional-tests/src/test/case-class-private-constructor-changes-ok/scalac-options-2.13.txt
@@ -1,2 +1,2 @@
--Xsource:3
--Wconf:cat=scala3-migration:s
\ No newline at end of file
+-Xsource:3-cross
+-Wconf:cat=scala3-migration:s
diff --git a/sbtplugin/src/sbt-test/sbt-mima-plugin/pom-only-project/build.sbt b/sbtplugin/src/sbt-test/sbt-mima-plugin/pom-only-project/build.sbt
index 7aaf84ed..72135389 100644
--- a/sbtplugin/src/sbt-test/sbt-mima-plugin/pom-only-project/build.sbt
+++ b/sbtplugin/src/sbt-test/sbt-mima-plugin/pom-only-project/build.sbt
@@ -2,7 +2,7 @@ organization := "com.typesafe"
 name := "pom-only-project"
 version := "1.1.0"
 mimaPreviousArtifacts := Set(organization.value %% moduleName.value % "1.0.0")
-scalaVersion := "2.13.12"
+scalaVersion := "2.13.13"
 
 // this is an arbitrary dependency, but one that's known to cause issues in POM-only projects
 // see https://github.com/lightbend/mima/issues/768 for more context