diff --git a/Sources/ApolloCodegenLib/Templates/SelectionSetTemplate.swift b/Sources/ApolloCodegenLib/Templates/SelectionSetTemplate.swift
index 0efcb0cf81..091ed6e6ab 100644
--- a/Sources/ApolloCodegenLib/Templates/SelectionSetTemplate.swift
+++ b/Sources/ApolloCodegenLib/Templates/SelectionSetTemplate.swift
@@ -483,15 +483,15 @@ struct SelectionSetTemplate {
   private func InitializerFulfilledFragments(
     _ selectionSet: IR.SelectionSet
   ) -> TemplateString {
-    var fulfilledFragments: [String] = ["Self"]
+    var fulfilledFragments: OrderedSet<String> = []
 
-    var next = selectionSet.scopePath.last.value.scopePath.head
-    while next.next != nil {
-      defer { next = next.next.unsafelyUnwrapped }
+    var currentNode = Optional(selectionSet.scopePath.last.value.scopePath.head)
+    while let node = currentNode {
+      defer { currentNode = node.next }
 
       let selectionSetName = SelectionSetNameGenerator.generatedSelectionSetName(
         for: selectionSet,
-        to: next,
+        to: node,
         format: .fullyQualified,
         pluralizer: config.pluralizer
       )
@@ -694,8 +694,6 @@ fileprivate extension IR.MergedSelections.MergedSource {
   func generatedSelectionSetNamesOfFullfilledFragments(
     pluralizer: Pluralizer
   ) -> [String] {
-    guard let fragment else { return [] }
-
     let entityRootNameInFragment = SelectionSetNameGenerator
       .generatedSelectionSetName(
         for: self,
diff --git a/Tests/ApolloCodegenTests/CodeGeneration/Templates/FragmentTemplateTests.swift b/Tests/ApolloCodegenTests/CodeGeneration/Templates/FragmentTemplateTests.swift
index 63fa453245..342c65c787 100644
--- a/Tests/ApolloCodegenTests/CodeGeneration/Templates/FragmentTemplateTests.swift
+++ b/Tests/ApolloCodegenTests/CodeGeneration/Templates/FragmentTemplateTests.swift
@@ -413,7 +413,7 @@ class FragmentTemplateTests: XCTestCase {
               "species": species,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestFragment.self)
             ]
           ))
         }
@@ -460,7 +460,7 @@ class FragmentTemplateTests: XCTestCase {
               "species": species,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestFragment.self)
             ]
           ))
         }
@@ -567,7 +567,7 @@ class FragmentTemplateTests: XCTestCase {
               "species": species,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestFragment.self)
             ]
           ))
         }
diff --git a/Tests/ApolloCodegenTests/CodeGeneration/Templates/OperationDefinitionTemplateTests.swift b/Tests/ApolloCodegenTests/CodeGeneration/Templates/OperationDefinitionTemplateTests.swift
index a65ccf27c2..91e9c2759d 100644
--- a/Tests/ApolloCodegenTests/CodeGeneration/Templates/OperationDefinitionTemplateTests.swift
+++ b/Tests/ApolloCodegenTests/CodeGeneration/Templates/OperationDefinitionTemplateTests.swift
@@ -333,7 +333,7 @@ class OperationDefinitionTemplateTests: XCTestCase {
                   "species": species,
                 ],
                 fulfilledFragments: [
-                  ObjectIdentifier(Self.self)
+                  ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
                 ]
               ))
             }
@@ -381,7 +381,7 @@ class OperationDefinitionTemplateTests: XCTestCase {
                   "species": species,
                 ],
                 fulfilledFragments: [
-                  ObjectIdentifier(Self.self)
+                  ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
                 ]
               ))
             }
diff --git a/Tests/ApolloCodegenTests/CodeGeneration/Templates/SelectionSet/SelectionSetTemplate_Initializers_Tests.swift b/Tests/ApolloCodegenTests/CodeGeneration/Templates/SelectionSet/SelectionSetTemplate_Initializers_Tests.swift
index d6d68f2a5e..cba5b7db9d 100644
--- a/Tests/ApolloCodegenTests/CodeGeneration/Templates/SelectionSet/SelectionSetTemplate_Initializers_Tests.swift
+++ b/Tests/ApolloCodegenTests/CodeGeneration/Templates/SelectionSet/SelectionSetTemplate_Initializers_Tests.swift
@@ -274,7 +274,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "species": species,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self)
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
           ]
         ))
       }
@@ -325,7 +325,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "species": species,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self)
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
           ]
         ))
       }
@@ -392,9 +392,9 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "species": species,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self),
             ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self),
-            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.AsAnimalUnion.self)
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.AsAnimalUnion.self),
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.AsAnimalUnion.AsDog.self)
           ]
         ))
       }
@@ -457,9 +457,9 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "species": species,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self),
             ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self),
-            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.AsPet.self)
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.AsPet.self),
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.AsPet.AsWarmBlooded.self)
           ]
         ))
       }
@@ -604,7 +604,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "nestedList_optional_optional_optional": nestedList_optional_optional_optional,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
             ]
           ))
         }
@@ -661,7 +661,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "fieldthree": fieldthree,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
             ]
           ))
         }
@@ -710,7 +710,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "aliased": aliased,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
             ]
           ))
         }
@@ -762,7 +762,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "friends": friends._fieldData,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
             ]
           ))
         }
@@ -814,7 +814,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "friends": friends._fieldData,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
             ]
           ))
         }
@@ -866,7 +866,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "friends": friends._fieldData,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
             ]
           ))
         }
@@ -918,7 +918,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "friend": friend._fieldData,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
             ]
           ))
         }
@@ -976,7 +976,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "__typename": __typename,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
             ]
           ))
         }
@@ -1028,7 +1028,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "friends": friends._fieldData,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
             ]
           ))
         }
@@ -1080,7 +1080,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "friend": friend._fieldData,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
             ]
           ))
         }
@@ -1143,8 +1143,8 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "age": age,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self),
-            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self),
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.AsPet.self)
           ]
         ))
       }
@@ -1221,7 +1221,9 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "feet": feet,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self)
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.AsCat.Height.self),
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.Height.self),
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.AsPet.Height.self)
           ]
         ))
       }
@@ -1278,7 +1280,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "species": species,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self),
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self),
             ObjectIdentifier(AnimalDetails.self)
           ]
         ))
@@ -1342,7 +1344,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "species": species,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self),
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self),
             ObjectIdentifier(Fragment2.self),
             ObjectIdentifier(AnimalDetails.self)
           ]
@@ -1405,8 +1407,8 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "species": species,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self),
             ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self),
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.AsPet.self),
             ObjectIdentifier(AnimalDetails.self)
           ]
         ))
@@ -1464,7 +1466,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "__typename": __typename,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self)
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
           ]
         ))
       }
@@ -1482,8 +1484,8 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "species": species,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self),
             ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self),
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.AsPet.self),
             ObjectIdentifier(AnimalDetails.self)
           ]
         ))
@@ -1570,8 +1572,8 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "name": name,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self),
             ObjectIdentifier(Fragment1.Predator.self),
+            ObjectIdentifier(Fragment1.Predator.AsPet.self),
             ObjectIdentifier(PetFragment.self),
             ObjectIdentifier(PredatorFragment.self),
             ObjectIdentifier(PredatorFragment.AsPet.self)
@@ -1654,8 +1656,8 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "name": name,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self),
             ObjectIdentifier(Fragment1.Predator.self),
+            ObjectIdentifier(Fragment1.Predator.AsPet.self),
             ObjectIdentifier(PetFragment.self),
             ObjectIdentifier(PredatorFragment.Predator.self),
             ObjectIdentifier(PredatorFragment.Predator.AsPet.self)
@@ -1711,7 +1713,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "name": name,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
             ]
           ))
         }
@@ -1769,8 +1771,8 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "friend": friend._fieldData,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self),
-              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self),
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.IfA.self)
             ]
           ))
         }
@@ -1828,8 +1830,8 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "friend": friend._fieldData,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self),
-              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self),
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.IfAAndNotB.self)
             ]
           ))
         }
@@ -1889,9 +1891,9 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "friend": friend._fieldData,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self),
               ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self),
-              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.IfA.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.IfA.self),
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.IfA.IfNotB.self)
             ]
           ))
         }
@@ -1951,8 +1953,8 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
               "species": species,
             ],
             fulfilledFragments: [
-              ObjectIdentifier(Self.self),
-              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.IfA.Friend.self)
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.IfA.Friend.self),
+              ObjectIdentifier(TestOperationQuery.Data.AllAnimal.IfA.Friend.IfNotB.self)
             ]
           ))
         }
@@ -2011,7 +2013,7 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "__typename": __typename,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self)
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self)
           ]
         ))
       }
@@ -2029,8 +2031,8 @@ class SelectionSetTemplate_Initializers_Tests: XCTestCase {
             "species": species,
           ],
           fulfilledFragments: [
-            ObjectIdentifier(Self.self),
             ObjectIdentifier(TestOperationQuery.Data.AllAnimal.self),
+            ObjectIdentifier(TestOperationQuery.Data.AllAnimal.IfA.self),
             ObjectIdentifier(AnimalDetails.self)
           ]
         ))