diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 43dd3f82a..43710c71f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,23 +13,23 @@ jobs:
       matrix:
         include:
           - os: ubuntu-20.04
-            java: 17
+            java: 21
             distribution: temurin
             jobtype: 1
           - os: ubuntu-latest
-            java: 17
+            java: 21
             distribution: temurin
             jobtype: 2
           - os: ubuntu-latest
-            java: 17
+            java: 21
             distribution: temurin
             jobtype: 3
           - os: ubuntu-latest
-            java: 17
+            java: 21
             distribution: temurin
             jobtype: 4
           - os: ubuntu-latest
-            java: 17
+            java: 21
             distribution: temurin
             jobtype: 5
           - os: ubuntu-latest
@@ -143,7 +143,7 @@ jobs:
       if: ${{ matrix.jobtype == 5 }}
       shell: bash
       run: |
-        ./sbt -v "++2.13.x; all utilControl/test utilRelation/test utilPosition/test; ++$SCALA_3!; all utilControl/test utilRelation/test utilPosition/test"
+        ./sbt -v "++2.13.x; all utilControl/test utilRelation/test utilPosition/test"
     - name: Build and test (6)
       if: ${{ matrix.jobtype == 6 }}
       shell: bash
diff --git a/project/build.properties b/project/build.properties
index 081fdbbc7..cb409aac6 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.10.0
+sbt.version=1.10.1
\ No newline at end of file
diff --git a/sbt-app/src/sbt-test/actions/cross-strict-aggregation-scala-3/build.sbt b/sbt-app/src/sbt-test/actions/cross-strict-aggregation-scala-3/build.sbt
index 919caa213..6e5d27874 100644
--- a/sbt-app/src/sbt-test/actions/cross-strict-aggregation-scala-3/build.sbt
+++ b/sbt-app/src/sbt-test/actions/cross-strict-aggregation-scala-3/build.sbt
@@ -2,13 +2,13 @@ scalaVersion := "2.12.20"
 
 lazy val core = project
   .settings(
-    crossScalaVersions := Seq("2.12.20", "3.0.2", "3.1.2")
+    crossScalaVersions := Seq("2.12.20", "3.3.1", "3.5.1")
   )
 
 lazy val subproj = project
   .dependsOn(core)
   .settings(
-    crossScalaVersions := Seq("2.12.20", "3.1.2"),
+    crossScalaVersions := Seq("2.12.20", "3.5.1"),
     // a random library compiled against Scala 3.1
-    libraryDependencies += "org.http4s" %% "http4s-core" % "0.23.12"
+    libraryDependencies += "org.http4s" %% "http4s-core" % "0.23.28"
   )
diff --git a/sbt-app/src/sbt-test/actions/cross-strict-aggregation-scala-3/test b/sbt-app/src/sbt-test/actions/cross-strict-aggregation-scala-3/test
index ea7afbf93..9e96b0f49 100644
--- a/sbt-app/src/sbt-test/actions/cross-strict-aggregation-scala-3/test
+++ b/sbt-app/src/sbt-test/actions/cross-strict-aggregation-scala-3/test
@@ -1,14 +1,14 @@
-> ++3.0.2 compile
+> ++3.3.1 compile
 
-$ exists core/target/scala-3.0.2
--$ exists core/target/scala-3.1.2
--$ exists subproj/target/scala-3.0.2
--$ exists subproj/target/scala-3.1.2
+$ exists core/target/scala-3.3.1
+-$ exists core/target/scala-3.5.1
+-$ exists subproj/target/scala-3.3.1
+-$ exists subproj/target/scala-3.5.1
 
 > clean
-> ++3.1.2 compile
+> ++3.5.1 compile
 
--$ exists core/target/scala-3.0.2
-$ exists core/target/scala-3.1.2
--$ exists subproj/target/scala-3.0.2
-$ exists subproj/target/scala-3.1.2
+-$ exists core/target/scala-3.3.1
+$ exists core/target/scala-3.5.1
+-$ exists subproj/target/scala-3.3.1
+$ exists subproj/target/scala-3.5.1
diff --git a/sbt-app/src/sbt-test/compiler-project/semantic-errors/build.sbt b/sbt-app/src/sbt-test/compiler-project/semantic-errors/build.sbt
index 019d06f89..c861b159b 100644
--- a/sbt-app/src/sbt-test/compiler-project/semantic-errors/build.sbt
+++ b/sbt-app/src/sbt-test/compiler-project/semantic-errors/build.sbt
@@ -1,7 +1,7 @@
 TaskKey[Unit]("checkJavaFailures") := {
   val reporter = savedReporter.value
   val ignore = (compile in Compile).failure.value
-  val ps = reporter.problems
+  val ps = reporter.problems.filter(_.severity() != xsbti.Severity.Info)
   assert(!ps.isEmpty, "Failed to report any problems!")
   // First error should be on a specific line/file
   val first = ps(0)
diff --git a/sbt-app/src/sbt-test/dependency-management/stdlib-unfreeze/a3/A.scala b/sbt-app/src/sbt-test/dependency-management/stdlib-unfreeze/a3/A.scala
index e6f35a100..600c11379 100644
--- a/sbt-app/src/sbt-test/dependency-management/stdlib-unfreeze/a3/A.scala
+++ b/sbt-app/src/sbt-test/dependency-management/stdlib-unfreeze/a3/A.scala
@@ -1,16 +1,24 @@
 import scala.quoted.* // imports Quotes, Expr
 
-package scala.collection {
-  object Exp:
-    // added in 2.13.10, not available in 2.13.8
-    def m(i: Int) = IterableOnce.checkArraySizeWithinVMLimit(i)
+package scala.collection.immutable {
+  object Exp {
+    // Access RedBlackTree.validate and Tree class added in Scala 2.13.13
+    // Scala 3.3.4 uses Scala 2.13.14 library
+    // Scala 3.3.2 uses Scala 2.13.12 library
+    // Hence RedBlackTree.validate is available in 3.3.4 but not in 3.3.2
+    // c.c. https://mvnrepository.com/artifact/org.scala-lang/scala3-library_3/3.3.2
+    // c.c. https://mvnrepository.com/artifact/org.scala-lang/scala3-library_3/3.3.4
+    def validateTree[A](tree: RedBlackTree.Tree[A, _])(implicit ordering: Ordering[A]): tree.type = {
+      RedBlackTree.validate(tree)
+    }
+  }
 }
 
 object Mac:
   inline def inspect(inline x: Any): Any = ${ inspectCode('x) }
 
   def inspectCode(x: Expr[Any])(using Quotes): Expr[Any] =
-    scala.collection.Exp.m(42)
+    scala.collection.immutable.Exp.validateTree(null)(null)
     println(x.show)
     x
 
diff --git a/sbt-app/src/sbt-test/dependency-management/stdlib-unfreeze/build.sbt b/sbt-app/src/sbt-test/dependency-management/stdlib-unfreeze/build.sbt
index 901101cea..ab04ff427 100644
--- a/sbt-app/src/sbt-test/dependency-management/stdlib-unfreeze/build.sbt
+++ b/sbt-app/src/sbt-test/dependency-management/stdlib-unfreeze/build.sbt
@@ -1,26 +1,26 @@
 import sbt.librarymanagement.InclExclRule
 
 lazy val a = project.settings(
-  scalaVersion := "2.13.6",
+  scalaVersion := "2.13.11",
   libraryDependencies += "org.scala-lang" % "scala-reflect" % scalaVersion.value,
-  TaskKey[Unit]("checkLibs") := checkLibs("2.13.6", (Compile/dependencyClasspath).value, ".*scala-(library|reflect).*"),
+  TaskKey[Unit]("checkLibs") := checkLibs("2.13.11", (Compile/dependencyClasspath).value, ".*scala-(library|reflect).*"),
 )
 
 lazy val b = project.dependsOn(a).settings(
-  scalaVersion := "2.13.8",
-  TaskKey[Unit]("checkLibs") := checkLibs("2.13.8", (Compile/dependencyClasspath).value, ".*scala-(library|reflect).*"),
+  scalaVersion := "2.13.12",
+  TaskKey[Unit]("checkLibs") := checkLibs("2.13.12", (Compile/dependencyClasspath).value, ".*scala-(library|reflect).*"),
 )
 
 lazy val a3 = project.settings(
-  scalaVersion := "3.2.2", // 2.13.10 library
+  scalaVersion := "3.3.4", // 2.13.14 library
 )
 
 lazy val b3 = project.dependsOn(a3).settings(
-  scalaVersion := "3.2.0", // 2.13.8 library
+  scalaVersion := "3.3.2", // 2.13.12 library
   TaskKey[Unit]("checkScala") := {
     val i = scalaInstance.value
     i.libraryJars.filter(_.toString.contains("scala-library")).toList match {
-      case List(l) => assert(l.toString.contains("2.13.10"), i.toString)
+      case List(l) => assert(l.toString.contains("2.13.14"), i.toString)
     }
     assert(i.compilerJars.filter(_.toString.contains("scala-library")).isEmpty, i.toString)
     assert(i.otherJars.filter(_.toString.contains("scala-library")).isEmpty, i.toString)
diff --git a/sbt-app/src/sbt-test/dependency-management/stdlib-unfreeze/test b/sbt-app/src/sbt-test/dependency-management/stdlib-unfreeze/test
index 7df93ab6c..8eb173463 100644
--- a/sbt-app/src/sbt-test/dependency-management/stdlib-unfreeze/test
+++ b/sbt-app/src/sbt-test/dependency-management/stdlib-unfreeze/test
@@ -2,17 +2,17 @@
 > b/checkLibs
 
 > b/run
-$ exists s2.13.8.txt
-$ delete s2.13.8.txt
+$ exists s2.13.12.txt
+$ delete s2.13.12.txt
 
 # don't crash when expanding the macro
 > b3/run
-$ exists s2.13.10.txt
-$ delete s2.13.10.txt
+$ exists s2.13.14.txt
+$ delete s2.13.14.txt
 
 > b3/checkScala
 
-# without the default `csrSameVersions`, scala-reflect in b stays at 2.13.6
+# without the default `csrSameVersions`, scala-reflect in b stays at 2.13.11
 > set b/csrSameVersions := Nil
 > b/update
 -> b/checkLibs
diff --git a/sbt-app/src/sbt-test/plugins/doc-scala3-js/build.sbt b/sbt-app/src/sbt-test/plugins/doc-scala3-js/build.sbt
index af0c70797..177518aa8 100644
--- a/sbt-app/src/sbt-test/plugins/doc-scala3-js/build.sbt
+++ b/sbt-app/src/sbt-test/plugins/doc-scala3-js/build.sbt
@@ -1,4 +1,4 @@
-val scala3Version = "3.0.1-RC1-bin-20210525-8f3fdf5-NIGHTLY"
+val scala3Version = "3.3.4"
 
 enablePlugins(ScalaJSPlugin)
 
diff --git a/sbt-app/src/sbt-test/plugins/doc-scala3-js/project/plugins.sbt b/sbt-app/src/sbt-test/plugins/doc-scala3-js/project/plugins.sbt
index c16aefc53..a42ace5f7 100644
--- a/sbt-app/src/sbt-test/plugins/doc-scala3-js/project/plugins.sbt
+++ b/sbt-app/src/sbt-test/plugins/doc-scala3-js/project/plugins.sbt
@@ -1 +1 @@
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.5.1")
\ No newline at end of file
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.17.0")
\ No newline at end of file
diff --git a/sbt-app/src/sbt-test/plugins/dotty-sandwich-sjs/build.sbt b/sbt-app/src/sbt-test/plugins/dotty-sandwich-sjs/build.sbt
index 5fd5c06b8..aa25b680e 100644
--- a/sbt-app/src/sbt-test/plugins/dotty-sandwich-sjs/build.sbt
+++ b/sbt-app/src/sbt-test/plugins/dotty-sandwich-sjs/build.sbt
@@ -1,15 +1,15 @@
-ThisBuild / scalaVersion := "2.13.12"
+ThisBuild / scalaVersion := "2.13.15"
 ThisBuild / scalacOptions += "-Ytasty-reader"
 
 lazy val scala3code = project
   .enablePlugins(ScalaJSPlugin)
-  .settings(scalaVersion := "3.1.3")
+  .settings(scalaVersion := "3.3.4")
 
 lazy val app = project
   .enablePlugins(ScalaJSPlugin)
   .dependsOn(scala3code)
   .settings(
     libraryDependencies ~= (_.filterNot(_.name.contains("scalajs-compiler"))),
-    addCompilerPlugin("org.scala-js" % "scalajs-compiler_2.13.8" % scalaJSVersion),
+    addCompilerPlugin("org.scala-js" % "scalajs-compiler_2.13.15" % scalaJSVersion),
     scalaJSUseMainModuleInitializer := true,
   )
diff --git a/sbt-app/src/sbt-test/plugins/dotty-sandwich-sjs/project/plugins.sbt b/sbt-app/src/sbt-test/plugins/dotty-sandwich-sjs/project/plugins.sbt
index 4c620dc0a..b3f269753 100644
--- a/sbt-app/src/sbt-test/plugins/dotty-sandwich-sjs/project/plugins.sbt
+++ b/sbt-app/src/sbt-test/plugins/dotty-sandwich-sjs/project/plugins.sbt
@@ -1 +1 @@
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.10.1")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.17.0")
diff --git a/sbt-app/src/sbt-test/plugins/dotty-sandwich/build.sbt b/sbt-app/src/sbt-test/plugins/dotty-sandwich/build.sbt
index a8e206007..f3ee7e93e 100644
--- a/sbt-app/src/sbt-test/plugins/dotty-sandwich/build.sbt
+++ b/sbt-app/src/sbt-test/plugins/dotty-sandwich/build.sbt
@@ -1,7 +1,7 @@
-ThisBuild / scalaVersion := "3.1.3"
+ThisBuild / scalaVersion := "3.3.4"
 ThisBuild / scalacOptions += "-Ytasty-reader"
 
-lazy val scala213 = "2.13.12"
+lazy val scala213 = "2.13.15"
 
 lazy val root = (project in file("."))
   .aggregate(fooApp, fooCore, barApp, barCore)
diff --git a/sbt-app/src/sbt-test/plugins/dotty/build.sbt b/sbt-app/src/sbt-test/plugins/dotty/build.sbt
index e46913668..48a4f88fe 100644
--- a/sbt-app/src/sbt-test/plugins/dotty/build.sbt
+++ b/sbt-app/src/sbt-test/plugins/dotty/build.sbt
@@ -1 +1 @@
-ThisBuild / scalaVersion := "3.1.3"
+ThisBuild / scalaVersion := "3.3.4"
diff --git a/sbt-app/src/sbt-test/plugins/scala-js-macro/build.sbt b/sbt-app/src/sbt-test/plugins/scala-js-macro/build.sbt
index ff4eb16f3..1039576e3 100644
--- a/sbt-app/src/sbt-test/plugins/scala-js-macro/build.sbt
+++ b/sbt-app/src/sbt-test/plugins/scala-js-macro/build.sbt
@@ -1,4 +1,4 @@
-ThisBuild / scalaVersion := "2.13.1"
+ThisBuild / scalaVersion := "2.13.15"
 
 lazy val root = (project in file("."))
   .aggregate(macroProvider, macroClient)
diff --git a/sbt-app/src/sbt-test/plugins/scala-js-macro/project/plugins.sbt b/sbt-app/src/sbt-test/plugins/scala-js-macro/project/plugins.sbt
index 8365c11cc..b3f269753 100644
--- a/sbt-app/src/sbt-test/plugins/scala-js-macro/project/plugins.sbt
+++ b/sbt-app/src/sbt-test/plugins/scala-js-macro/project/plugins.sbt
@@ -1 +1 @@
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.0.0")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.17.0")
diff --git a/sbt-app/src/sbt-test/project/scala3-cross-target/build.sbt b/sbt-app/src/sbt-test/project/scala3-cross-target/build.sbt
index d87ccac1b..4550b3c07 100644
--- a/sbt-app/src/sbt-test/project/scala3-cross-target/build.sbt
+++ b/sbt-app/src/sbt-test/project/scala3-cross-target/build.sbt
@@ -1,3 +1,3 @@
-scalaVersion := "3.0.0-RC2-bin-20210328-cca5f8f-NIGHTLY"
+scalaVersion := "3.3.4"
 name := "foo"
 version := "1.0.0"
diff --git a/sbt-app/src/sbt-test/project/scala3-cross-target/test b/sbt-app/src/sbt-test/project/scala3-cross-target/test
index ff09e0f19..5509f79c2 100644
--- a/sbt-app/src/sbt-test/project/scala3-cross-target/test
+++ b/sbt-app/src/sbt-test/project/scala3-cross-target/test
@@ -1,7 +1,7 @@
 > compile
 
-$ exists target/scala-3.0.0-RC2-bin-20210328-cca5f8f-NIGHTLY/classes/Foo$.class
+$ exists target/scala-3.3.4/classes/Foo$.class
 
 > package
 
-$ exists target/scala-3.0.0-RC2-bin-20210328-cca5f8f-NIGHTLY/foo_3.0.0-RC2-1.0.0.jar
+$ exists target/scala-3.3.4/foo_3-1.0.0.jar
diff --git a/sbt-app/src/sbt-test/project/scala3-sandwich-sjs/build.sbt b/sbt-app/src/sbt-test/project/scala3-sandwich-sjs/build.sbt
index 661ac82a1..88ccf3d59 100644
--- a/sbt-app/src/sbt-test/project/scala3-sandwich-sjs/build.sbt
+++ b/sbt-app/src/sbt-test/project/scala3-sandwich-sjs/build.sbt
@@ -1,15 +1,15 @@
-ThisBuild / scalaVersion := "2.13.6"
+ThisBuild / scalaVersion := "2.13.15"
 ThisBuild / scalacOptions += "-Ytasty-reader"
 
 lazy val scala3code = project
   .enablePlugins(ScalaJSPlugin)
-  .settings(scalaVersion := "3.0.0")
+  .settings(scalaVersion := "3.3.4")
 
 lazy val app = project
   .enablePlugins(ScalaJSPlugin)
   .dependsOn(scala3code)
   .settings(
-    scalaVersion := "2.13.6",
+    scalaVersion := "2.13.15",
     scalacOptions += "-Ytasty-reader",
     scalaJSUseMainModuleInitializer := true
   )
diff --git a/sbt-app/src/sbt-test/project/scala3-sandwich-sjs/project/plugins.sbt b/sbt-app/src/sbt-test/project/scala3-sandwich-sjs/project/plugins.sbt
index 56abd248d..b3f269753 100644
--- a/sbt-app/src/sbt-test/project/scala3-sandwich-sjs/project/plugins.sbt
+++ b/sbt-app/src/sbt-test/project/scala3-sandwich-sjs/project/plugins.sbt
@@ -1 +1 @@
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.6.0")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.17.0")
diff --git a/sbt-app/src/sbt-test/project/scala3-sandwich/build.sbt b/sbt-app/src/sbt-test/project/scala3-sandwich/build.sbt
index 75988d69d..79f714e28 100644
--- a/sbt-app/src/sbt-test/project/scala3-sandwich/build.sbt
+++ b/sbt-app/src/sbt-test/project/scala3-sandwich/build.sbt
@@ -1,6 +1,6 @@
-ThisBuild / scalaVersion := "3.0.0"
+ThisBuild / scalaVersion := "3.3.4"
 
-lazy val scala213 = "2.13.6"
+lazy val scala213 = "2.13.15"
 
 lazy val root = (project in file("."))
   .aggregate(fooApp, fooCore, barApp, barCore)
diff --git a/sbt-app/src/sbt-test/project/scripted13/test b/sbt-app/src/sbt-test/project/scripted13/test
index 1617a03a4..6935c0e54 100644
--- a/sbt-app/src/sbt-test/project/scripted13/test
+++ b/sbt-app/src/sbt-test/project/scripted13/test
@@ -1,6 +1,6 @@
 # This tests that this sbt scripted plugin can launch the previous one
 
-> ^^0.13.18
+> ^^1.10.1
 
 $ copy-file changes/A.scala src/sbt-test/a/b/A.scala
 > scripted
diff --git a/zinc-lm-integration/src/test/scala/sbt/internal/inc/ZincComponentCompilerSpec.scala b/zinc-lm-integration/src/test/scala/sbt/internal/inc/ZincComponentCompilerSpec.scala
index bad241e51..799458167 100644
--- a/zinc-lm-integration/src/test/scala/sbt/internal/inc/ZincComponentCompilerSpec.scala
+++ b/zinc-lm-integration/src/test/scala/sbt/internal/inc/ZincComponentCompilerSpec.scala
@@ -16,11 +16,8 @@ class ZincComponentCompilerSpec extends IvyBridgeProviderSpecification {
   val scala2106 = "2.10.6"
   val scala2118 = "2.11.8"
   val scala21111 = "2.11.11"
-  val scala2121 = "2.12.1"
-  val scala2122 = "2.12.2"
-  val scala2123 = "2.12.3"
-  val scala2130 = "2.13.0"
-  val scala2131 = "2.13.1"
+  val scala21220 = "2.12.20"
+  val scala21311 = "2.13.11"
 
   def isJava8: Boolean = sys.props("java.specification.version") == "1.8"
 
@@ -40,14 +37,11 @@ class ZincComponentCompilerSpec extends IvyBridgeProviderSpecification {
     } else ()
   }
 
-  it should "compile the bridge for Scala 2.12.2" in { implicit td =>
-    IO.withTemporaryDirectory(t => getCompilerBridge(t, logger, scala2121) should exist)
-    IO.withTemporaryDirectory(t => getCompilerBridge(t, logger, scala2122) should exist)
-    IO.withTemporaryDirectory(t => getCompilerBridge(t, logger, scala2123) should exist)
+  it should "compile the bridge for Scala 2.12.20" in { implicit td =>
+    IO.withTemporaryDirectory(t => getCompilerBridge(t, logger, scala21220) should exist)
   }
 
-  it should "compile the bridge for Scala 2.13" in { implicit td =>
-    IO.withTemporaryDirectory(t => getCompilerBridge(t, logger, scala2130) should exist)
-    IO.withTemporaryDirectory(t => getCompilerBridge(t, logger, scala2131) should exist)
+  it should "compile the bridge for Scala 2.13.11" in { implicit td =>
+    IO.withTemporaryDirectory(t => getCompilerBridge(t, logger, scala21311) should exist)
   }
 }