diff --git a/support-services/src/main/scala/com/gu/support/redemption/generator/GiftCodeGenerator.scala b/support-services/src/main/scala/com/gu/support/redemption/generator/GiftCodeGenerator.scala
index 048aeea062..03900fff98 100644
--- a/support-services/src/main/scala/com/gu/support/redemption/generator/GiftCodeGenerator.scala
+++ b/support-services/src/main/scala/com/gu/support/redemption/generator/GiftCodeGenerator.scala
@@ -2,18 +2,18 @@ package com.gu.support.redemption.generator
 
 import java.security.SecureRandom
 
-import com.gu.support.redemption.generator.ConstructCode.GenerateGiftCode
+import com.gu.support.redemption.generator.CodeBuilder.GenerateGiftCode
 
 object GiftCodeGenerator {
 
   lazy val randomGiftCodes: Iterator[GenerateGiftCode] = {
     val gen = new SecureRandom()
     val ints = Iterator.continually(gen.nextInt())
-    apply(ints)
+    fromInts(ints)
   }
 
-  def apply(random: Iterator[Int]): Iterator[GenerateGiftCode] =
-    CodeSuffixGenerator(random).map(ConstructCode.apply)
+  def fromInts(random: Iterator[Int]): Iterator[GenerateGiftCode] =
+    CodeSuffixGenerator.generate(random).map(CodeBuilder.build)
 
 }
 
@@ -29,7 +29,7 @@ object GiftDuration {
 
 }
 
-object ConstructCode {
+object CodeBuilder {
 
   private val prefix = "gd"
 
@@ -46,7 +46,7 @@ object ConstructCode {
     def withDuration(duration: GiftDuration): GiftCode
   }
 
-  def apply(code: CodeSuffixGenerator.CodeSuffix): GenerateGiftCode =
+  def build(code: CodeSuffixGenerator.CodeSuffix): GenerateGiftCode =
     (duration: GiftDuration) => {
       val init = prefix + duration.code + "-"
       GiftCode(init + code.value).get
@@ -64,10 +64,10 @@ object CodeSuffixGenerator {
         .map(new CodeSuffix(_))
   }
 
-  def apply(random: Iterator[Int]): Iterator[CodeSuffix] =
+  def generate(random: Iterator[Int]): Iterator[CodeSuffix] =
     random.grouped(6).map(codeFromGroup).map(CodeSuffix.apply).map(_.get)
 
-  def codeFromGroup(groupedInts: Seq[Int]): String = {
+  private[generator] def codeFromGroup(groupedInts: Seq[Int]): String = {
     val chars = groupedInts
       .map(int => java.lang.Integer.toString(int, 34).last)
       .map {
diff --git a/support-services/src/test/scala/com/gu/support/redemption/generator/GiftCodeGeneratorSpec.scala b/support-services/src/test/scala/com/gu/support/redemption/generator/GiftCodeGeneratorSpec.scala
index 72e9e2498c..348a3ae9c0 100644
--- a/support-services/src/test/scala/com/gu/support/redemption/generator/GiftCodeGeneratorSpec.scala
+++ b/support-services/src/test/scala/com/gu/support/redemption/generator/GiftCodeGeneratorSpec.scala
@@ -6,7 +6,7 @@ import org.scalatest.matchers.should.Matchers
 class GiftCodeGeneratorSpec extends AnyFlatSpec with Matchers {
 
   it should "work in the basic case" in {
-    val giftCode = GiftCodeGenerator(Iterator.continually(0)).next.withDuration(GiftDuration.Gift3Month)
+    val giftCode = GiftCodeGenerator.fromInts(Iterator.continually(0)).next.withDuration(GiftDuration.Gift3Month)
     giftCode.value should be("gd03-000000")
   }
 
@@ -22,16 +22,16 @@ class GiftCodeGeneratorSpec extends AnyFlatSpec with Matchers {
 
 }
 
-class ConstructCodeSpec  extends AnyFlatSpec with Matchers {
+class CodeBuilderSpec  extends AnyFlatSpec with Matchers {
 
   it should "get the durations right for the codes" in {
-    ConstructCode(CodeSuffixGenerator.CodeSuffix("000000").get).withDuration(GiftDuration.Gift3Month).value should be("gd03-000000")
-    ConstructCode(CodeSuffixGenerator.CodeSuffix("000000").get).withDuration(GiftDuration.Gift6Month).value should be("gd06-000000")
-    ConstructCode(CodeSuffixGenerator.CodeSuffix("000000").get).withDuration(GiftDuration.Gift12Month).value should be("gd12-000000")
+    CodeBuilder.build(CodeSuffixGenerator.CodeSuffix("000000").get).withDuration(GiftDuration.Gift3Month).value should be("gd03-000000")
+    CodeBuilder.build(CodeSuffixGenerator.CodeSuffix("000000").get).withDuration(GiftDuration.Gift6Month).value should be("gd06-000000")
+    CodeBuilder.build(CodeSuffixGenerator.CodeSuffix("000000").get).withDuration(GiftDuration.Gift12Month).value should be("gd12-000000")
   }
 
   it should "not allow invalid codes to be constructed" in {
-    ConstructCode.GiftCode("invalid") should be(None)
+    CodeBuilder.GiftCode("invalid") should be(None)
   }
 
 }
@@ -48,7 +48,7 @@ class CodeSuffixGeneratorSpec extends AnyFlatSpec with Matchers {
 
   it should "cycle through all the possiblities" in {
     val seq = Stream.from(0).iterator
-    CodeSuffixGenerator(seq).take(7).toList.map(_.value) should be(
+    CodeSuffixGenerator.generate(seq).take(7).toList.map(_.value) should be(
       List("0y2345", "6789ab", "cdefgh", "ijkzmn", "opqrst", "uvwx0y", "234567")
     )
   }