diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
index e4f7fda7..c9def90f 100644
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@@ -1,2 +1,5 @@
 # Scala Steward: Reformat with scalafmt 3.7.17
 98879bf22a5e11b4adf2047825c9efa0b9a22428
+
+# Scala Steward: Reformat with scalafmt 3.8.3
+24e4581d26e7e20abb4a8be246dcd27c55fc4a8a
diff --git a/.scalafmt.conf b/.scalafmt.conf
index 3a9f1f18..5acffc21 100644
--- a/.scalafmt.conf
+++ b/.scalafmt.conf
@@ -1,4 +1,4 @@
-version = "3.7.17"
+version = "3.8.3"
 
 runner.dialect=scala213source3
 
diff --git a/build.sbt b/build.sbt
index 9afe9228..edf9acb7 100644
--- a/build.sbt
+++ b/build.sbt
@@ -69,7 +69,8 @@ lazy val core = crossProject(JVMPlatform, JSPlatform, NativePlatform)
       "co.fs2"        %%% "fs2-core"    % Version.fs2,
       "org.typelevel" %%% "cats-effect" % Version.catsEffect,
       // https://github.com/portable-scala/portable-scala-reflect/issues/23
-      "org.portable-scala" %%% "portable-scala-reflect" % Version.portableReflect cross CrossVersion.for3Use2_13,
+      "org.portable-scala" %%% "portable-scala-reflect" % Version
+        .portableReflect cross CrossVersion.for3Use2_13,
       "org.typelevel" %% "scalac-compat-annotation" % Version.scalacCompatAnnotation,
       "org.scalameta" %%% "munit-diff" % Version.munitDiff,
       if (scalaVersion.value.startsWith("3."))
@@ -87,8 +88,9 @@ lazy val core = crossProject(JVMPlatform, JSPlatform, NativePlatform)
 lazy val coreJVM = core.jvm
   .settings(
     libraryDependencies ++= Seq(
-      "org.scala-js" %%% "scalajs-stubs" % Version.scalajsStubs % "provided" cross CrossVersion.for3Use2_13,
-      "junit" % "junit" % Version.junit % Optional
+      "org.scala-js" %%% "scalajs-stubs" % Version
+        .scalajsStubs  % "provided" cross CrossVersion.for3Use2_13,
+      "junit"          % "junit"         % Version.junit % Optional
     )
   )
 
@@ -105,8 +107,9 @@ lazy val framework = crossProject(JVMPlatform, JSPlatform, NativePlatform)
 lazy val frameworkJVM = framework.jvm
   .settings(
     libraryDependencies ++= Seq(
-      "org.scala-sbt" % "test-interface" % Version.testInterface,
-      "org.scala-js" %%% "scalajs-stubs" % Version.scalajsStubs % "provided" cross CrossVersion.for3Use2_13
+      "org.scala-sbt"  % "test-interface" % Version.testInterface,
+      "org.scala-js" %%% "scalajs-stubs" % Version
+        .scalajsStubs  % "provided" cross CrossVersion.for3Use2_13
     )
   )
 
diff --git a/modules/core/shared/src/main/scala-3/weaver/ExpectMacro.scala b/modules/core/shared/src/main/scala-3/weaver/ExpectMacro.scala
index 8f2349ee..1ba4c16b 100644
--- a/modules/core/shared/src/main/scala-3/weaver/ExpectMacro.scala
+++ b/modules/core/shared/src/main/scala-3/weaver/ExpectMacro.scala
@@ -12,15 +12,13 @@ private[weaver] trait ExpectMacro {
    * Use the [[Expectations.Helpers.clue]] function to investigate any failures.
    */
   inline def apply(assertion: Clues ?=> Boolean): Expectations =
-    ${ ExpectMacro.applyImpl('assertion) }
+  ${ ExpectMacro.applyImpl('assertion) }
 
-    /**
-     * Asserts that a boolean value is true and displays a failure message if
-     * not.
-     *
-     * Use the [[Expectations.Helpers.clue]] function to investigate any
-     * failures.
-     */
+  /**
+   * Asserts that a boolean value is true and displays a failure message if not.
+   *
+   * Use the [[Expectations.Helpers.clue]] function to investigate any failures.
+   */
   inline def apply(
       assertion: Clues ?=> Boolean,
       message: => String): Expectations =
diff --git a/modules/core/shared/src/main/scala/weaver/Formatter.scala b/modules/core/shared/src/main/scala/weaver/Formatter.scala
index 1823a04b..b953284f 100644
--- a/modules/core/shared/src/main/scala/weaver/Formatter.scala
+++ b/modules/core/shared/src/main/scala/weaver/Formatter.scala
@@ -66,7 +66,8 @@ object Formatter {
     val newLine = '\n'
     builder.append(formatResultStatus(name, result, outcome.duration))
 
-    if ((mode == Verbose && outcome.status.isFailed) || (mode == Summary && !outcome.status.isFailed))
+    if ((mode == Verbose && outcome.status
+        .isFailed) || (mode == Summary && !outcome.status.isFailed))
       result.formatted.foreach { resultInfo =>
         builder.append(EOL)
         builder.append(resultInfo)
diff --git a/modules/framework-cats/shared/src/test/scala/DogFoodTests.scala b/modules/framework-cats/shared/src/test/scala/DogFoodTests.scala
index 89d91b34..4624a984 100644
--- a/modules/framework-cats/shared/src/test/scala/DogFoodTests.scala
+++ b/modules/framework-cats/shared/src/test/scala/DogFoodTests.scala
@@ -96,7 +96,8 @@ object DogFoodTests extends IOSuite {
 
         val expected =
           s"""
-            |- erroring with a long message: ${Meta.ErroringWithLongPayload.smiles} 0ms
+            |- erroring with a long message: ${Meta.ErroringWithLongPayload
+              .smiles} 0ms
             |  Meta$$CustomException: surfaced error
             |
             |  DogFoodTests.scala:15    my.package.MyClass#MyMethod
diff --git a/modules/scalacheck/shared/src/main/scala/weaver/scalacheck/Checkers.scala b/modules/scalacheck/shared/src/main/scala/weaver/scalacheck/Checkers.scala
index 693359a1..b54c2cd2 100644
--- a/modules/scalacheck/shared/src/main/scala/weaver/scalacheck/Checkers.scala
+++ b/modules/scalacheck/shared/src/main/scala/weaver/scalacheck/Checkers.scala
@@ -168,7 +168,8 @@ trait Checkers {
             s"""Property test failed on try $ith with seed $seed and input $input.
                 |You can reproduce this by adding the following override to your suite:
                 |
-                |override def checkConfig = super.checkConfig.withInitialSeed($seed.toOption)""".stripMargin)
+                |override def checkConfig = super.checkConfig.withInitialSeed($seed.toOption)"""
+              .stripMargin)
           .and(exp)
         copy(failure = Some(failure))
       } else this