diff --git a/modules/core/src/test/scala/uk/co/odinconsultants/ChangeDataFlowSpec.scala b/modules/core/src/test/scala/uk/co/odinconsultants/ChangeDataFlowSpec.scala
index df7f3cf..ecb5d9a 100644
--- a/modules/core/src/test/scala/uk/co/odinconsultants/ChangeDataFlowSpec.scala
+++ b/modules/core/src/test/scala/uk/co/odinconsultants/ChangeDataFlowSpec.scala
@@ -5,8 +5,6 @@ import org.scalatest.GivenWhenThen
 import org.scalatest.matchers.should.Matchers._
 import uk.co.odinconsultants.documentation_utils.{SpecPretifier, TableNameFixture}
 
-import java.io.ByteArrayOutputStream
-
 class ChangeDataFlowSpec extends SpecPretifier with GivenWhenThen with TableNameFixture {
 
   info(
@@ -63,14 +61,6 @@ class ChangeDataFlowSpec extends SpecPretifier with GivenWhenThen with TableName
       )
     }
   }
-
-  def captureOutputOf[T](thunk: => T): String = {
-    val out = new ByteArrayOutputStream()
-    Console.withOut(out) {
-      thunk
-    }
-    new String(out.toByteArray)
-  }
 }
 
 object ChangeDataFlowSpec {
diff --git a/modules/core/src/test/scala/uk/co/odinconsultants/MergingDataSpec.scala b/modules/core/src/test/scala/uk/co/odinconsultants/MergingDataSpec.scala
index 55e7e02..0a8b3f2 100644
--- a/modules/core/src/test/scala/uk/co/odinconsultants/MergingDataSpec.scala
+++ b/modules/core/src/test/scala/uk/co/odinconsultants/MergingDataSpec.scala
@@ -48,20 +48,6 @@ class MergingDataSpec extends SpecPretifier with GivenWhenThen with TableNameFix
     }
   }
 
-  def histogram[K, V](kv: Map[K, V], names: Seq[String]): String = {
-    val width = (kv.keys.map(_.toString.length) ++ names.map(_.length)).max + 2
-    Seq(columnNames(names, width), histogramValues(kv, width)).mkString("\n")
-  }
-
-  def columnNames(names: Seq[String], width: Int = 20): String = {
-    val cols  = names.map(x => s"%-${width}s".format(x)).mkString("")
-    val lines = names.map(x => s"%-${width}s".format("-" * x.length)).mkString("")
-    Seq(cols, lines).mkString("\n")
-  }
-
-  def histogramValues[K, V](kv: Map[K, V], width: Int = 20): String =
-    kv.map { case (k, v) => s"%-${width}s%s".format(k, v) }.mkString("\n")
-
   private def partitionKeyToCount(
       data: Seq[Datum]
   ): Map[Long, Int] =
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 0c98fd5..a12334c 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -13,7 +13,7 @@ object Dependencies {
     val hadoopAws          = "3.3.1"
     val minio              = "8.5.5"
     val deltaLake          = "3.0.0"
-    val documentationUtils = "0.8"
+    val documentationUtils = "0.11"
     val scalaTest          = "3.2.17"
   }