diff --git a/bin/test-release.sh b/bin/test-release.sh
index 6469d3e6827..d540e1f0b0d 100755
--- a/bin/test-release.sh
+++ b/bin/test-release.sh
@@ -26,6 +26,7 @@ coursier fetch \
   org.scalameta:mtags_2.13.8:$version \
   org.scalameta:mtags_2.13.9:$version \
   org.scalameta:mtags_2.13.10:$version \
+  org.scalameta:mtags_2.13.11:$version \
   org.scalameta:mtags_2.12.9:$version \
   org.scalameta:mtags_2.12.10:$version \
   org.scalameta:mtags_2.12.11:$version \
diff --git a/build.sbt b/build.sbt
index 4b27cc583ae..8a09c52ec6c 100644
--- a/build.sbt
+++ b/build.sbt
@@ -339,9 +339,10 @@ val mtagsSettings = List(
     val current = (Compile / unmanagedSourceDirectories).value
     val base = (Compile / sourceDirectory).value
     val regex = "(\\d+)\\.(\\d+)\\.(\\d+).*".r
-    // For scala 2.13.9/10 we need to have a special Compat.scala
+    // For scala +2.13.9 we need to have a special Compat.scala
     // For this case filter out `scala-2.13` directory that comes by default
-    if (scalaVersion.value == "2.13.9" || scalaVersion.value == "2.13.10")
+    val scalaVersionsWithSpecialCompat = Set("2.13.9", "2.13.10", "2.13.11")
+    if (scalaVersionsWithSpecialCompat(scalaVersion.value))
       current.filter(f => f.getName() != "scala-2.13")
     else
       current
diff --git a/metals/src/main/scala/scala/meta/internal/metals/MetalsLspService.scala b/metals/src/main/scala/scala/meta/internal/metals/MetalsLspService.scala
index 7c26ee598d0..bbbc952e5c8 100644
--- a/metals/src/main/scala/scala/meta/internal/metals/MetalsLspService.scala
+++ b/metals/src/main/scala/scala/meta/internal/metals/MetalsLspService.scala
@@ -1746,7 +1746,7 @@ class MetalsLspService(
   override def completionItemResolve(
       item: CompletionItem
   ): CompletableFuture[CompletionItem] =
-    CancelTokens.future { token =>
+    CancelTokens.future { _ =>
       if (clientConfig.isCompletionItemResolve) {
         compilers.completionItemResolve(item)
       } else {
@@ -1784,7 +1784,7 @@ class MetalsLspService(
   override def foldingRange(
       params: FoldingRangeRequestParams
   ): CompletableFuture[util.List[FoldingRange]] = {
-    CancelTokens.future { token =>
+    CancelTokens.future { _ =>
       val path = params.getTextDocument().getUri().toAbsolutePath
       if (path.isScala)
         parseTrees.currentFuture.map(_ =>
diff --git a/metals/src/main/scala/scala/meta/internal/metals/MtagsResolver.scala b/metals/src/main/scala/scala/meta/internal/metals/MtagsResolver.scala
index 5d96ede297e..7709d4fd9bd 100644
--- a/metals/src/main/scala/scala/meta/internal/metals/MtagsResolver.scala
+++ b/metals/src/main/scala/scala/meta/internal/metals/MtagsResolver.scala
@@ -48,6 +48,7 @@ object MtagsResolver {
   private val removedScalaVersions = Map(
     "2.13.1" -> "0.11.10",
     "2.13.2" -> "0.11.10",
+    "2.13.3" -> "0.11.12",
     "2.12.9" -> "0.11.10",
     "3.0.0" -> "0.11.10",
     "3.0.1" -> "0.11.10",
diff --git a/mtags/src/main/scala-2.13.11/meta/internal/pc/Compat.scala b/mtags/src/main/scala-2.13.11/meta/internal/pc/Compat.scala
new file mode 100644
index 00000000000..a4eeed4b00c
--- /dev/null
+++ b/mtags/src/main/scala-2.13.11/meta/internal/pc/Compat.scala
@@ -0,0 +1,26 @@
+package scala.meta.internal.pc
+
+import scala.reflect.internal.Reporter
+import scala.tools.nsc.reporters.StoreReporter
+
+trait Compat { this: MetalsGlobal =>
+  def metalsFunctionArgTypes(tpe: Type): List[Type] =
+    definitions.functionOrPfOrSamArgTypes(tpe)
+
+  val AssignOrNamedArg: NamedArgExtractor = NamedArg
+
+  def storeReporter(r: Reporter): Option[StoreReporter] =
+    r match {
+      case s: StoreReporter => Some(s)
+      case _ => None
+    }
+
+  def isAliasCompletion(m: Member): Boolean = m match {
+    case tm: TypeMember => tm.aliasInfo.nonEmpty
+    case sm: ScopeMember => sm.aliasInfo.nonEmpty
+    case _ => false
+  }
+
+  def constantType(c: ConstantType): ConstantType =
+    if (c.value.isSuitableLiteralType) LiteralType(c.value) else c
+}
diff --git a/project/V.scala b/project/V.scala
index 4bd35d495c0..15072fa846a 100644
--- a/project/V.scala
+++ b/project/V.scala
@@ -3,10 +3,10 @@ import sbt._
 object V {
   val scala210 = "2.10.7"
   val scala211 = "2.11.12"
-  val scala212 = "2.12.17"
-  val scala213 = "2.13.10"
-  val scala3 = "3.2.2"
-  val scala3RC: Option[String] = Some("3.3.0-RC4")
+  val scala212 = "2.12.18"
+  val scala213 = "2.13.11"
+  val scala3 = "3.3.0"
+  val scala3RC: Option[String] = Some("3.3.1-RC1")
   val sbtScala = "2.12.16"
   val ammonite212Version = "2.12.17"
   val ammonite213Version = "2.13.10"
@@ -71,6 +71,7 @@ object V {
     "2.12.12",
     "2.12.13",
     "2.13.3",
+    "2.12.14",
     "2.13.4",
     "2.13.5",
     "2.13.6",
@@ -85,6 +86,7 @@ object V {
     "2.13.7",
     "2.13.8",
     "2.13.9",
+    "2.13.10",
   )
   def scala2Versions = nonDeprecatedScala2Versions ++ deprecatedScala2Versions
 
diff --git a/tests/cross/src/test/scala/tests/pc/CompletionDocSuite.scala b/tests/cross/src/test/scala/tests/pc/CompletionDocSuite.scala
index afd6d273027..0ab5cbdb32a 100644
--- a/tests/cross/src/test/scala/tests/pc/CompletionDocSuite.scala
+++ b/tests/cross/src/test/scala/tests/pc/CompletionDocSuite.scala
@@ -561,6 +561,31 @@ class CompletionDocSuite extends BaseCompletionSuite {
            |StringBuilder(capacity: Int): StringBuilder
            |StringBuilder(initCapacity: Int, initValue: String): StringBuilder
            |""".stripMargin,
+      "2.13.11" ->
+        """|> A builder of `String` which is also a mutable sequence of characters.
+           |
+           | This class provides an API mostly compatible with `java.lang.StringBuilder`,
+           | except where there are conflicts with the Scala collections API, such as the `reverse` method:
+           | [reverse](reverse) produces a new `StringBuilder`, and [reverseInPlace](reverseInPlace) mutates this builder.
+           |
+           | Mutating operations return either `this.type`, i.e., the current builder, or `Unit`.
+           |
+           | Other methods extract data or information from the builder without mutating it.
+           |
+           | The distinction is also reflected in naming conventions used by collections,
+           | such as `append`, which mutates, and `appended`, which does not, or `reverse`,
+           | which does not mutate, and `reverseInPlace`, which does.
+           |
+           | The `String` result may be obtained using either `result()` or `toString`.
+           |
+           | $multipleResults
+           |
+           |
+           |**See**
+           |- ["Scala's Collection Library overview"](https://docs.scala-lang.org/overviews/collections-2.13/concrete-mutable-collection-classes.html#stringbuilders)
+           | section on `StringBuilders` for more information.
+           |StringBuilder scala.collection.mutable
+           |""".stripMargin,
     ),
   )
 
diff --git a/tests/cross/src/test/scala/tests/pc/CompletionScalaCliSuite.scala b/tests/cross/src/test/scala/tests/pc/CompletionScalaCliSuite.scala
index 87716ec0cf9..ba2e62d8b41 100644
--- a/tests/cross/src/test/scala/tests/pc/CompletionScalaCliSuite.scala
+++ b/tests/cross/src/test/scala/tests/pc/CompletionScalaCliSuite.scala
@@ -89,7 +89,7 @@ class CompletionScalaCliSuite extends BaseCompletionSuite {
   check(
     "plugin".tag(
       IgnoreScalaVersion(version =>
-        Set("2.12.18")(version) ||
+        Set("2.12.16", "2.12.18", "2.13.11")(version) ||
           version.contains(
             "NIGHTLY"
           ) || version.contains(
diff --git a/tests/cross/src/test/scala/tests/pc/CompletionSuite.scala b/tests/cross/src/test/scala/tests/pc/CompletionSuite.scala
index 7e59eb31f3e..d977de454df 100644
--- a/tests/cross/src/test/scala/tests/pc/CompletionSuite.scala
+++ b/tests/cross/src/test/scala/tests/pc/CompletionSuite.scala
@@ -1258,6 +1258,15 @@ class CompletionSuite extends BaseCompletionSuite {
        |implicitConversions scala.languageFeature
        |""".stripMargin,
     topLines = Some(5),
+    compat = Map(
+      "2.13.11" ->
+        """|dynamics scala.languageFeature
+           |existentials scala.languageFeature
+           |experimental scala.languageFeature
+           |implicitConversions scala.languageFeature
+           |postfixOps scala.languageFeature
+           |""".stripMargin
+    ),
   )
 
   check(
diff --git a/tests/cross/src/test/scala/tests/pc/SignatureHelpDocSuite.scala b/tests/cross/src/test/scala/tests/pc/SignatureHelpDocSuite.scala
index 00b9d32514f..ea979ef2d77 100644
--- a/tests/cross/src/test/scala/tests/pc/SignatureHelpDocSuite.scala
+++ b/tests/cross/src/test/scala/tests/pc/SignatureHelpDocSuite.scala
@@ -1,6 +1,7 @@
 package tests.pc
 
 import tests.BaseSignatureHelpSuite
+import scala.meta.internal.mtags.BuildInfo
 
 class SignatureHelpDocSuite extends BaseSignatureHelpSuite {
 
@@ -132,6 +133,8 @@ class SignatureHelpDocSuite extends BaseSignatureHelpSuite {
             |""".stripMargin,
     ),
   )
+
+  val addedSpace = if (BuildInfo.scalaCompilerVersion == "2.13.11") "" else " "
   checkDoc(
     "curry3",
     """
@@ -171,31 +174,31 @@ class SignatureHelpDocSuite extends BaseSignatureHelpSuite {
        |""".stripMargin,
     compat = Map(
       "2.13" ->
-        """|Applies a binary operator to a start value and all elements of this collection,
-           | going left to right.
-           |
-           | Note: will not terminate for infinite-sized collections.
-           | Note: might return different results for different runs, unless the
-           |underlying collection type is ordered or the operator is associative
-           |and commutative.
-           |
-           |
-           |**Type Parameters**
-           |- `B`: the result type of the binary operator.
-           |
-           |**Parameters**
-           |- `z`: the start value.
-           |- `op`: the binary operator.
-           |
-           |**Returns:** the result of inserting `op` between consecutive elements of this collection,
-           |          going left to right with the start value `z` on the left:
-           |          `op(...op(z, x), x, ..., x)` where `x, ..., x`
-           |           are the elements of this collection.
-           |          Returns `z` if this collection is empty.
-           |foldLeft[B](z: B)(op: (B, Int) => B): B
-           |                  ^^^^^^^^^^^^^^^^^
-           |  @param op (Int, Int) => Int
-           |""".stripMargin,
+        s"""|Applies a binary operator to a start value and all elements of this collection,
+            | going left to right.
+            |
+            | Note: will not terminate for infinite-sized collections.
+            | Note: might return different results for different runs, unless the
+            |underlying collection type is ordered or the operator is associative
+            |and commutative.
+            |
+            |
+            |**Type Parameters**
+            |- `B`: the result type of the binary operator.
+            |
+            |**Parameters**
+            |- `z`: the start value.
+            |- `op`: the binary operator.
+            |
+            |**Returns:** the result of inserting `op` between consecutive elements of this collection,
+            |          going left to right with the start value `z` on the left:
+            |          `op(...op(z, x), x, ..., x)` where `x, ..., x`
+            |          ${addedSpace}are the elements of this collection.
+            |          Returns `z` if this collection is empty.
+            |foldLeft[B](z: B)(op: (B, Int) => B): B
+            |                  ^^^^^^^^^^^^^^^^^
+            |  @param op (Int, Int) => Int
+            |""".stripMargin,
       "3" ->
         """|Applies a binary operator to a start value and all elements of this collection,
            | going left to right.