diff --git a/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/bar-app/D.scala b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/bar-app/D.scala
new file mode 100644
index 000000000..b937ae06c
--- /dev/null
+++ b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/bar-app/D.scala
@@ -0,0 +1,5 @@
+package example
+
+object D {
+  val x = C.x
+}
diff --git a/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/bar-core/C.scala b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/bar-core/C.scala
new file mode 100644
index 000000000..4d4fcc6df
--- /dev/null
+++ b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/bar-core/C.scala
@@ -0,0 +1,5 @@
+package example
+
+object C {
+  val x = 1
+}
diff --git a/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/baz-app/F.scala b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/baz-app/F.scala
new file mode 100644
index 000000000..5035ba457
--- /dev/null
+++ b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/baz-app/F.scala
@@ -0,0 +1,5 @@
+package example
+
+object F {
+  val x = E.x
+}
diff --git a/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/baz-core/E.scala b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/baz-core/E.scala
new file mode 100644
index 000000000..cdac7bd76
--- /dev/null
+++ b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/baz-core/E.scala
@@ -0,0 +1,5 @@
+package example
+
+object E {
+  val x = 1
+}
diff --git a/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/build.sbt b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/build.sbt
new file mode 100644
index 000000000..50014c4b8
--- /dev/null
+++ b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/build.sbt
@@ -0,0 +1,54 @@
+lazy val check = taskKey[Unit]("")
+
+val dottyVersion = "3.0.0-M1"
+ThisBuild / resolvers += "scala-integration" at "https://scala-ci.typesafe.com/artifactory/scala-integration/"
+// TODO use 2.13.4 when it's out
+lazy val scala213 = "2.13.4-bin-aeee8f0"
+
+lazy val fooApp = (projectMatrix in file("foo-app"))
+  .dependsOn(fooCore)
+  .settings(
+    name := "foo app",
+  )
+  .jvmPlatform(scalaVersions = Seq(dottyVersion))
+
+lazy val fooCore = (projectMatrix in file("foo-core"))
+  .settings(
+    name := "foo core",
+  )
+  .jvmPlatform(scalaVersions = Seq(scala213, "2.12.12"))
+
+lazy val barApp = (projectMatrix in file("bar-app"))
+  .dependsOn(barCore)
+  .settings(
+    name := "bar app",
+  )
+  .jvmPlatform(scalaVersions = Seq(scala213))
+
+lazy val barCore = (projectMatrix in file("bar-core"))
+  .settings(
+    name := "bar core",
+  )
+  .jvmPlatform(scalaVersions = Seq(dottyVersion))
+
+// choose 2.13 when bazCore offers both 2.13 and Dotty
+lazy val bazApp = (projectMatrix in file("baz-app"))
+  .dependsOn(bazCore)
+  .settings(
+    name := "baz app",
+    check := {
+      val cp = (Compile / fullClasspath).value
+        .map(_.data.getName)
+
+      assert(cp.contains("baz-core_2.13-0.1.0-SNAPSHOT.jar"), s"$cp")
+      assert(!cp.contains("baz-core_3.0.0-M1-0.1.0-SNAPSHOT.jar"), s"$cp")
+    },
+  )
+  .jvmPlatform(scalaVersions = Seq(scala213))
+
+lazy val bazCore = (projectMatrix in file("baz-core"))
+  .settings(
+    name := "baz core",
+    exportJars := true,
+  )
+  .jvmPlatform(scalaVersions = Seq(scala213, dottyVersion))
diff --git a/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/foo-app/B.scala b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/foo-app/B.scala
new file mode 100644
index 000000000..ed82c07d1
--- /dev/null
+++ b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/foo-app/B.scala
@@ -0,0 +1,5 @@
+package example
+
+object B {
+  val x = A.x
+}
diff --git a/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/foo-core/A.scala b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/foo-core/A.scala
new file mode 100644
index 000000000..be4b82a9f
--- /dev/null
+++ b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/foo-core/A.scala
@@ -0,0 +1,5 @@
+package example
+
+object A {
+  val x = 1
+}
diff --git a/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/project/build.properties b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/project/build.properties
new file mode 100644
index 000000000..c19c768d6
--- /dev/null
+++ b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/project/build.properties
@@ -0,0 +1 @@
+sbt.version=1.4.2
diff --git a/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/project/plugins.sbt b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/project/plugins.sbt
new file mode 100644
index 000000000..2db30a892
--- /dev/null
+++ b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/project/plugins.sbt
@@ -0,0 +1,6 @@
+sys.props.get("plugin.version") match {
+  case Some(x) => addSbtPlugin("com.eed3si9n" % "sbt-projectmatrix" % x)
+  case _ => sys.error("""|The system property 'plugin.version' is not defined.
+                         |Specify this property using the scriptedLaunchOpts -D.""".stripMargin)
+}
+addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.4.5")
diff --git a/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/test b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/test
new file mode 100644
index 000000000..0450417ab
--- /dev/null
+++ b/src/sbt-test/projectMatrix/jvm-sandwich-sbt-1.3/test
@@ -0,0 +1,5 @@
+> fooApp3_0/compile
+
+> barApp/compile
+
+> bazApp/check
diff --git a/src/sbt-test/projectMatrix/jvm-sandwich/build.sbt b/src/sbt-test/projectMatrix/jvm-sandwich/build.sbt
index 9a34ee49b..144beadf5 100644
--- a/src/sbt-test/projectMatrix/jvm-sandwich/build.sbt
+++ b/src/sbt-test/projectMatrix/jvm-sandwich/build.sbt
@@ -1,6 +1,6 @@
 lazy val check = taskKey[Unit]("")
 
-val dottyVersion = "0.23.0"
+val dottyVersion = "3.0.0-M1"
 ThisBuild / resolvers += "scala-integration" at "https://scala-ci.typesafe.com/artifactory/scala-integration/"
 // TODO use 2.13.4 when it's out
 lazy val scala213 = "2.13.4-bin-aeee8f0"
@@ -40,8 +40,9 @@ lazy val bazApp = (projectMatrix in file("baz-app"))
       val cp = (Compile / fullClasspath).value
         .map(_.data.getName)
 
+      streams.value.log.info(cp.toString)
       assert(cp.contains("baz-core_2.13-0.1.0-SNAPSHOT.jar"), s"$cp")
-      assert(!cp.contains("baz-core_0.23-0.1.0-SNAPSHOT.jar"), s"$cp")
+      assert(!cp.contains("baz-core_3.0.0-M1-0.1.0-SNAPSHOT.jar"), s"$cp")
     },
   )
   .jvmPlatform(scalaVersions = Seq(scala213))
diff --git a/src/sbt-test/projectMatrix/jvm-sandwich/project/build.properties b/src/sbt-test/projectMatrix/jvm-sandwich/project/build.properties
index 0837f7a13..c19c768d6 100644
--- a/src/sbt-test/projectMatrix/jvm-sandwich/project/build.properties
+++ b/src/sbt-test/projectMatrix/jvm-sandwich/project/build.properties
@@ -1 +1 @@
-sbt.version=1.3.13
+sbt.version=1.4.2
diff --git a/src/sbt-test/projectMatrix/jvm-sandwich/project/plugins.sbt b/src/sbt-test/projectMatrix/jvm-sandwich/project/plugins.sbt
index c129c032b..2db30a892 100644
--- a/src/sbt-test/projectMatrix/jvm-sandwich/project/plugins.sbt
+++ b/src/sbt-test/projectMatrix/jvm-sandwich/project/plugins.sbt
@@ -3,4 +3,4 @@ sys.props.get("plugin.version") match {
   case _ => sys.error("""|The system property 'plugin.version' is not defined.
                          |Specify this property using the scriptedLaunchOpts -D.""".stripMargin)
 }
-addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.4.1")
+addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.4.5")
diff --git a/src/sbt-test/projectMatrix/jvm-sandwich/test b/src/sbt-test/projectMatrix/jvm-sandwich/test
index 762592688..0450417ab 100644
--- a/src/sbt-test/projectMatrix/jvm-sandwich/test
+++ b/src/sbt-test/projectMatrix/jvm-sandwich/test
@@ -1,4 +1,4 @@
-> fooApp0_23/compile
+> fooApp3_0/compile
 
 > barApp/compile