diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b0c1198..a0921d6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,4 +22,4 @@ jobs:
         java-version: ${{matrix.java}}
         cache: sbt
     - name: Test
-      run: sbt ++${{matrix.scala}} test package
+      run: sbt ++${{matrix.scala}} test doc package
diff --git a/build.sbt b/build.sbt
index 387af15..8d44e47 100644
--- a/build.sbt
+++ b/build.sbt
@@ -41,7 +41,7 @@ lazy val collectionContrib = crossProject(JVMPlatform, JSPlatform, NativePlatfor
     },
     Compile / doc / scalacOptions ++= {
       CrossVersion.partialVersion(scalaVersion.value) match {
-        case Some((2, _)) => Seq("-implicits", "-groups", "-nowarn")
+        case Some((2, _)) => Seq("-implicits", "-groups", "-nowarn", "-Xsource:3-cross")
         case _            => Seq.empty
       }
     },