diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cc817d4..1fcf9ef 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -268,6 +268,31 @@ jobs:
           modules-ignore: rootjs_2.12 rootjs_2.13 rootjs_3 docs-output_2.12 docs-output_2.13 docs-output_3 weaver-docs_2.12 weaver-docs_2.13 weaver-docs_3 rootjvm_2.12 rootjvm_2.13 rootjvm_3 rootnative_2.12 rootnative_2.13 rootnative_3
           configs-ignore: test scala-tool scala-doc-tool test-internal
 
+  validate-steward:
+    name: Validate Steward Config
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        java: [temurin@11]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout current branch (fast)
+        uses: actions/checkout@v4
+
+      - name: Setup Java (temurin@11)
+        id: setup-java-temurin-11
+        if: matrix.java == 'temurin@11'
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 11
+
+      - uses: coursier/setup-action@v1
+        with:
+          apps: scala-steward
+
+      - run: scala-steward validate-repo-config .scala-steward.conf
+
   site:
     name: Generate Site
     strategy:
diff --git a/.scala-steward.conf b/.scala-steward.conf
new file mode 100644
index 0000000..36a9108
--- /dev/null
+++ b/.scala-steward.conf
@@ -0,0 +1 @@
+updates.ignore = [ { groupId = "org.scalameta", artifactId="scala-diff" } ]
diff --git a/build.sbt b/build.sbt
index 606a35c..e0e8a3a 100644
--- a/build.sbt
+++ b/build.sbt
@@ -52,6 +52,7 @@ val Version = new {
   val testInterface          = "1.0"
   val scalacCompatAnnotation = "0.1.4"
   val http4s                 = "0.23.26"
+  val munitDiff              = "1.0.0-RC1"
 }
 
 lazy val root = tlCrossRootProject.aggregate(core,
@@ -71,9 +72,15 @@ lazy val core = crossProject(JVMPlatform, JSPlatform, NativePlatform)
       "com.eed3si9n.expecty" %%% "expecty"     % Version.expecty,
       // https://github.com/portable-scala/portable-scala-reflect/issues/23
       "org.portable-scala" %%% "portable-scala-reflect" % Version.portableReflect cross CrossVersion.for3Use2_13,
-      "org.typelevel" %% "scalac-compat-annotation" % Version.scalacCompatAnnotation
-    )
-  )
+      "org.typelevel" %% "scalac-compat-annotation" % Version.scalacCompatAnnotation,
+      "org.scalameta" %%% "munit-diff" % Version.munitDiff
+    ),
+    // Shades the scala-diff dependency.
+    shadedDependencies += "org.scalameta" %%% "munit-diff" % "<ignored>",
+    shadingRules += ShadingRule.moveUnder("munit.diff",
+                                          "weaver.internal.shaded"),
+    validNamespaces ++= Set("weaver", "org")
+  ).enablePlugins(ShadingPlugin)
 
 lazy val coreJVM = core.jvm
   .settings(
diff --git a/modules/core/shared/src/main/scala/weaver/Comparison.scala b/modules/core/shared/src/main/scala/weaver/Comparison.scala
index d6f7055..16cef6d 100644
--- a/modules/core/shared/src/main/scala/weaver/Comparison.scala
+++ b/modules/core/shared/src/main/scala/weaver/Comparison.scala
@@ -2,8 +2,8 @@ package weaver
 
 import cats.Eq
 import cats.Show
-import com.eed3si9n.expecty._
 import scala.annotation.implicitNotFound
+import munit.diff.Diffs
 
 /**
  * A type class used to compare two instances of the same type and construct an
@@ -44,14 +44,8 @@ object Comparison {
         if (eqv.eqv(found, expected)) {
           Result.Success
         } else {
-          val expectedLines = showA.show(expected).linesIterator.toSeq
-          val foundLines    = showA.show(found).linesIterator.toSeq
-          val report = DiffUtil
-            .mkColoredLineDiff(expectedLines, foundLines)
-            .linesIterator
-            .toSeq
-            .map(str => Console.RESET.toString + str)
-            .mkString("\n")
+          val report =
+            Diffs.createDiffOnlyReport(showA.show(found), showA.show(expected))
           Result.Failure(report)
         }
       }
diff --git a/modules/framework-cats/shared/src/test/scala/DogFoodTests.scala b/modules/framework-cats/shared/src/test/scala/DogFoodTests.scala
index 0e7cda5..ffa4aff 100644
--- a/modules/framework-cats/shared/src/test/scala/DogFoodTests.scala
+++ b/modules/framework-cats/shared/src/test/scala/DogFoodTests.scala
@@ -268,12 +268,11 @@ object DogFoodTests extends IOSuite {
         |- (eql Comparison) 0ms
         |  Values not equal: (src/main/DogFoodTests.scala:5)
         |
-        |  Foo {     |  Foo {
-        |    s: foo  |    s: foo
-        |    i: [1]  |    i: [2]
-        |  }         |  }
-        """.stripMargin.trim
-
+        |  => Diff (- obtained, + expected)
+        |     s: foo
+        |  -  i: 2
+        |  +  i: 1
+        |   }""".stripMargin.trim
         expect.same(actual, expected)
     }
   }
@@ -292,12 +291,11 @@ object DogFoodTests extends IOSuite {
         |- (same Comparison) 0ms
         |  Values not equal: (src/main/DogFoodTests.scala:5)
         |
-        |  Foo {     |  Foo {
-        |    s: foo  |    s: foo
-        |    i: [1]  |    i: [2]
-        |  }         |  }
-        """.stripMargin.trim
-
+        |  => Diff (- obtained, + expected)
+        |     s: foo
+        |  -  i: 2
+        |  +  i: 1
+        |   }""".stripMargin.trim
         expect.same(actual, expected)
     }
   }
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 95ce543..95f5459 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,7 +1,7 @@
 // format: off
 addSbtPlugin("ch.epfl.scala"        % "sbt-scalafix"                  % "0.12.0")
 
-addSbtPlugin("org.scala-js"         % "sbt-scalajs"                   % "1.15.0")
+addSbtPlugin("org.scala-js"         % "sbt-scalajs"                   % "1.16.0")
 
 addSbtPlugin("org.scala-native"     % "sbt-scala-native"              % "0.4.16")
 
@@ -12,3 +12,5 @@ addSbtPlugin("org.typelevel"        % "sbt-typelevel-site"            % "0.6.7")
 addSbtPlugin("org.scalameta"        % "sbt-scalafmt"                  % "2.5.2")
 
 addSbtPlugin("org.scalameta"        % "sbt-mdoc"                      % "2.5.2")
+
+addSbtPlugin("io.get-coursier"      % "sbt-shading"                   % "2.1.4")