diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
index 2c67df4d..b875e2d0 100644
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@@ -10,4 +10,6 @@
 9cc3dd838b39afa97ddb76987d070f35f9bd36b8
 
 # eikek: remove header from all sources
-eefe534f36aceb8b9b73176d968fb9eaff2a71d7
\ No newline at end of file
+eefe534f36aceb8b9b73176d968fb9eaff2a71d7
+# Scala Steward: Reformat with scalafmt 3.8.4
+d69f2b9ad270b60b31fb1be20913f7b3fde799f4
diff --git a/.scalafmt.conf b/.scalafmt.conf
index 89de18f1..1fee2b08 100644
--- a/.scalafmt.conf
+++ b/.scalafmt.conf
@@ -1,4 +1,4 @@
-version = "3.8.3"
+version = "3.8.4"
 
 preset = default
 align.preset = some
diff --git a/modules/events/src/test/scala/io/renku/events/EventsGenerators.scala b/modules/events/src/test/scala/io/renku/events/EventsGenerators.scala
index 0a86247f..5785e1d6 100644
--- a/modules/events/src/test/scala/io/renku/events/EventsGenerators.scala
+++ b/modules/events/src/test/scala/io/renku/events/EventsGenerators.scala
@@ -65,9 +65,8 @@ object EventsGenerators:
     Gen.listOfN(1, plgen).flatMap { pl =>
       val schema = pl.head.schema
       val mt = pl.head.msgType
-      eventMessageGen(schema, mt, Gen.const(pl)).map(msg =>
-        msg.copy(header = msg.header.withSchemaVersion(pl.head.version.head))
-      )
+      eventMessageGen(schema, mt, Gen.const(pl))
+        .map(msg => msg.copy(header = msg.header.withSchemaVersion(pl.head.version.head)))
     }
 
   def v1ProjectCreatedGen(prefix: String): Gen[v1.ProjectCreated] =
diff --git a/modules/openid-keycloak/src/main/scala/io/renku/openid/keycloak/JwtVerify.scala b/modules/openid-keycloak/src/main/scala/io/renku/openid/keycloak/JwtVerify.scala
index 5de94d50..43c26a66 100644
--- a/modules/openid-keycloak/src/main/scala/io/renku/openid/keycloak/JwtVerify.scala
+++ b/modules/openid-keycloak/src/main/scala/io/renku/openid/keycloak/JwtVerify.scala
@@ -19,6 +19,5 @@ object JwtVerify:
       def verify(token: String): F[Either[JwtError, RenkuToken]] =
         Applicative[F].pure(result match
           case a: JwtError   => Left(a)
-          case b: RenkuToken => Right(b)
-        )
+          case b: RenkuToken => Right(b))
     }
diff --git a/modules/search-api/src/main/scala/io/renku/search/api/auth/Authenticate.scala b/modules/search-api/src/main/scala/io/renku/search/api/auth/Authenticate.scala
index 47cbac27..f786f158 100644
--- a/modules/search-api/src/main/scala/io/renku/search/api/auth/Authenticate.scala
+++ b/modules/search-api/src/main/scala/io/renku/search/api/auth/Authenticate.scala
@@ -21,7 +21,7 @@ object Authenticate:
           case AuthToken.AnonymousId(id) =>
             Right(AuthContext.anonymousId(id.value)).pure[F]
           case AuthToken.JwtToken(token) =>
-            EitherT(verify.verify(token).map(ClaimToContext.from)).leftSemiflatMap {
-              err => logger.warn(err.sanitized, err.cause).as(err.sanitized)
+            EitherT(verify.verify(token).map(ClaimToContext.from)).leftSemiflatMap { err =>
+              logger.warn(err.sanitized, err.cause).as(err.sanitized)
             }.value
     }
diff --git a/modules/search-cli/src/main/scala/io/renku/search/cli/perftests/PerfTestsConfig.scala b/modules/search-cli/src/main/scala/io/renku/search/cli/perftests/PerfTestsConfig.scala
index b45a0be6..9b238ec5 100644
--- a/modules/search-cli/src/main/scala/io/renku/search/cli/perftests/PerfTestsConfig.scala
+++ b/modules/search-cli/src/main/scala/io/renku/search/cli/perftests/PerfTestsConfig.scala
@@ -67,7 +67,7 @@ private object RedisConfigOpts:
   private val refreshInterval: Opts[FiniteDuration] =
     Opts
       .option[FiniteDuration]("redis-connection-refresh", "Redis connection refresh")
-      .withDefault(1 hour)
+      .withDefault(1.hour)
 
   val configOpts: Opts[RedisConfig] =
     (host, port, sentinel, db.map(Option(_)), password, masterSet, refreshInterval)
diff --git a/modules/search-provision/src/main/scala/io/renku/search/provision/handler/DocumentMerger.scala b/modules/search-provision/src/main/scala/io/renku/search/provision/handler/DocumentMerger.scala
index 7b23d406..f9be895e 100644
--- a/modules/search-provision/src/main/scala/io/renku/search/provision/handler/DocumentMerger.scala
+++ b/modules/search-provision/src/main/scala/io/renku/search/provision/handler/DocumentMerger.scala
@@ -28,14 +28,13 @@ object DocumentMerger:
     }
 
   given DocumentMerger[ProjectMemberAdded] =
-    instance[ProjectMemberAdded](_.toModel(DocVersion.NotExists).some) {
-      (paa, existing) =>
-        existing match
-          case p: PartialEntityDocument.Project =>
-            p.modifyEntityMembers(_.addMember(paa.userId, paa.role)).some
-          case p: ProjectDocument =>
-            p.modifyEntityMembers(_.addMember(paa.userId, paa.role)).some
-          case _: PartialEntityDocument.Group | _: GroupDocument | _: UserDocument => None
+    instance[ProjectMemberAdded](_.toModel(DocVersion.NotExists).some) { (paa, existing) =>
+      existing match
+        case p: PartialEntityDocument.Project =>
+          p.modifyEntityMembers(_.addMember(paa.userId, paa.role)).some
+        case p: ProjectDocument =>
+          p.modifyEntityMembers(_.addMember(paa.userId, paa.role)).some
+        case _: PartialEntityDocument.Group | _: GroupDocument | _: UserDocument => None
     }
 
   given DocumentMerger[ProjectMemberUpdated] =
@@ -127,15 +126,14 @@ object DocumentMerger:
     }
 
   given DocumentMerger[GroupMemberUpdated] =
-    instance[GroupMemberUpdated](_.toModel(DocVersion.NotExists).some) {
-      (gmu, existing) =>
-        existing match
-          case g: PartialEntityDocument.Group =>
-            g.modifyEntityMembers(_.addMember(gmu.userId, gmu.role)).some
-          case g: GroupDocument =>
-            g.modifyEntityMembers(_.addMember(gmu.userId, gmu.role)).some
-          case _: PartialEntityDocument.Project | _: UserDocument | _: ProjectDocument =>
-            None
+    instance[GroupMemberUpdated](_.toModel(DocVersion.NotExists).some) { (gmu, existing) =>
+      existing match
+        case g: PartialEntityDocument.Group =>
+          g.modifyEntityMembers(_.addMember(gmu.userId, gmu.role)).some
+        case g: GroupDocument =>
+          g.modifyEntityMembers(_.addMember(gmu.userId, gmu.role)).some
+        case _: PartialEntityDocument.Project | _: UserDocument | _: ProjectDocument =>
+          None
     }
 
   given DocumentMerger[GroupMemberRemoved] =
diff --git a/modules/search-provision/src/main/scala/io/renku/search/provision/handler/FetchFromSolr.scala b/modules/search-provision/src/main/scala/io/renku/search/provision/handler/FetchFromSolr.scala
index 28323401..1794e6ae 100644
--- a/modules/search-provision/src/main/scala/io/renku/search/provision/handler/FetchFromSolr.scala
+++ b/modules/search-provision/src/main/scala/io/renku/search/provision/handler/FetchFromSolr.scala
@@ -22,7 +22,9 @@ import io.renku.solr.client.{QueryData, QueryString}
 trait FetchFromSolr[F[_]]:
   def fetchEntityForUser(userId: Id): Stream[F, EntityId]
   def loadProjectsByGroup[A](msg: EntityOrPartialMessage[A]): F[EntityOrPartialMessage[A]]
-  def loadEntityOrPartial[A](using IdExtractor[A])(
+  def loadEntityOrPartial[A](using
+      IdExtractor[A]
+  )(
       msg: EventMessage[A]
   ): F[EntityOrPartialMessage[A]]
   def loadProjectGroups(
@@ -89,7 +91,9 @@ object FetchFromSolr:
           QueryData(query).withFields(EntityDocumentSchema.Fields.id)
         )
 
-      def loadEntityOrPartial[A](using IdExtractor[A])(
+      def loadEntityOrPartial[A](using
+          IdExtractor[A]
+      )(
           msg: EventMessage[A]
       ): F[EntityOrPartialMessage[A]] =
         val loaded =
diff --git a/modules/solr-client/src/main/scala/io/renku/solr/client/QueryData.scala b/modules/solr-client/src/main/scala/io/renku/solr/client/QueryData.scala
index 798b1c54..42cf06f9 100644
--- a/modules/solr-client/src/main/scala/io/renku/solr/client/QueryData.scala
+++ b/modules/solr-client/src/main/scala/io/renku/solr/client/QueryData.scala
@@ -31,7 +31,7 @@ final case class QueryData(
   def withCursor(cursorMark: CursorMark): QueryData =
     copy(params = params.updated("cursorMark", cursorMark.render))
 
-  /** When using a cursor, it is required to add a `uniqueKey`field to the sort clause to
+  /** When using a cursor, it is required to add a `uniqueKey` field to the sort clause to
     * guarantee a deterministic order.
     */
   def withCursor(cursorMark: CursorMark, keyField: FieldName): QueryData =
diff --git a/project/AvroCodeGen.scala b/project/AvroCodeGen.scala
index 3960b3cb..2056ef90 100644
--- a/project/AvroCodeGen.scala
+++ b/project/AvroCodeGen.scala
@@ -8,16 +8,14 @@ object AvroCodeGen extends AutoPlugin {
 
   def avroHuggerSettings = Seq(
     libraryDependencies ++= Dependencies.avro,
-    Compile / avroScalaCustomTypes := {
+    Compile / avroScalaCustomTypes :=
       avrohugger.format.SpecificRecord.defaultTypes.copy(
         record = avrohugger.types.ScalaCaseClassWithSchema
-      )
-    },
-    Compile / avroScalaSpecificCustomTypes := {
+      ),
+    Compile / avroScalaSpecificCustomTypes :=
       avrohugger.format.SpecificRecord.defaultTypes.copy(
         record = avrohugger.types.ScalaCaseClassWithSchema
       )
-    }
   )
 
   override def projectSettings = avroHuggerSettings ++ Seq(
diff --git a/project/DbTestPlugin.scala b/project/DbTestPlugin.scala
index 3ea9421d..b3cec532 100644
--- a/project/DbTestPlugin.scala
+++ b/project/DbTestPlugin.scala
@@ -16,7 +16,7 @@ object DbTestPlugin extends AutoPlugin {
   override def trigger = PluginTrigger.AllRequirements
 
   override def projectSettings: Seq[Def.Setting[_]] = Seq(
-    Test / dbTests := {
+    Test / dbTests :=
       Def
         .sequential(
           Def.task {
@@ -36,8 +36,7 @@ object DbTestPlugin extends AutoPlugin {
             RedisServer.forceStop()
           }
         )
-        .value
-    },
+        .value,
     // We need to disable running the `dbTests` on all aggregates,
     // otherwise it would try starting/stopping servers again and
     // again. The `all(ScopeFilter(inAggregates(ThisProject)))` makes