From 441381877d56ed5803e5c26aadb329f6343870f1 Mon Sep 17 00:00:00 2001
From: Neal Beeken <neal.beeken@mongodb.com>
Date: Wed, 26 Mar 2025 11:33:33 -0400
Subject: [PATCH 01/11] test(NODE-6492): add integration tests for transaction
 write concern behavior

---
 .../transactions/transactions.prose.test.ts   | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 test/integration/transactions/transactions.prose.test.ts

diff --git a/test/integration/transactions/transactions.prose.test.ts b/test/integration/transactions/transactions.prose.test.ts
new file mode 100644
index 00000000000..52fdd409580
--- /dev/null
+++ b/test/integration/transactions/transactions.prose.test.ts
@@ -0,0 +1,49 @@
+import { expect } from 'chai';
+
+import { type MongoClient } from '../../mongodb';
+
+const metadata: MongoDBMetadataUI = {
+  requires: {
+    topology: '!single'
+  }
+};
+
+describe('Transactions Spec Prose', function () {
+  let client: MongoClient;
+  const started = [];
+
+  beforeEach(async function () {
+    started.length = 0;
+    client = this.configuration.newClient({}, { monitorCommands: true });
+    client.on('commandStarted', ev => started.push(ev));
+  });
+
+  afterEach(async function () {
+    await client.close();
+  });
+
+  describe('Options Inside Transaction', function () {
+    it(
+      '1.0 Write concern not inherited from collection object inside transaction.',
+      metadata,
+      async () => {
+        await client.withSession(async session => {
+          session.startTransaction();
+
+          const collection = client.db().collection('txn-test', { writeConcern: { w: 0 } });
+
+          await collection.insertOne({ n: 1 }, { session });
+
+          await session.commitTransaction();
+        });
+
+        const insertStarted = started.find(ev => ev.commandName === 'insert');
+        expect(insertStarted).to.not.have.nested.property('command.writeConcern');
+
+        // not in asked by the spec test but good to check, this is where the WC would be if it wasn't ignored.
+        const commitTransactionStarted = started.find(ev => ev.commandName === 'commitTransaction');
+        expect(commitTransactionStarted).to.not.have.nested.property('command.writeConcern');
+      }
+    );
+  });
+});

From f52a918a2444c94b9364e3db2d6e73e54ebf9477 Mon Sep 17 00:00:00 2001
From: Neal Beeken <neal.beeken@mongodb.com>
Date: Wed, 26 Mar 2025 12:41:47 -0400
Subject: [PATCH 02/11] test: reset transaction test collection before each
 test

---
 .../transactions/transactions.prose.test.ts         | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/test/integration/transactions/transactions.prose.test.ts b/test/integration/transactions/transactions.prose.test.ts
index 52fdd409580..f841b11f612 100644
--- a/test/integration/transactions/transactions.prose.test.ts
+++ b/test/integration/transactions/transactions.prose.test.ts
@@ -15,10 +15,23 @@ describe('Transactions Spec Prose', function () {
   beforeEach(async function () {
     started.length = 0;
     client = this.configuration.newClient({}, { monitorCommands: true });
+
+    await client
+      .db()
+      .collection('txn-test')
+      .drop()
+      .catch(() => null);
+    await client.db().createCollection('txn-test');
+
     client.on('commandStarted', ev => started.push(ev));
   });
 
   afterEach(async function () {
+    await client
+      .db()
+      .collection('txn-test')
+      .drop()
+      .catch(() => null);
     await client.close();
   });
 

From c6f83b374a0b682ba19553978a5ee38a0b7573f3 Mon Sep 17 00:00:00 2001
From: Neal Beeken <neal.beeken@mongodb.com>
Date: Wed, 26 Mar 2025 13:50:56 -0400
Subject: [PATCH 03/11] test: skip transactions on sharded clusters for MongoDB
 versions < 4.2

---
 .../transactions/transactions.prose.test.ts           | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/test/integration/transactions/transactions.prose.test.ts b/test/integration/transactions/transactions.prose.test.ts
index f841b11f612..99e42675582 100644
--- a/test/integration/transactions/transactions.prose.test.ts
+++ b/test/integration/transactions/transactions.prose.test.ts
@@ -1,4 +1,5 @@
 import { expect } from 'chai';
+import * as semver from 'semver';
 
 import { type MongoClient } from '../../mongodb';
 
@@ -13,6 +14,16 @@ describe('Transactions Spec Prose', function () {
   const started = [];
 
   beforeEach(async function () {
+    if (
+      semver.satisfies(this.configuration.version, '>4.2') &&
+      this.configuration.topologyType === 'Sharded'
+    ) {
+      if (this.currentTest) {
+        this.currentTest.skipReason =
+          'Transactions on sharded clusters are only supported after 4.2';
+      }
+      this.skip();
+    }
     started.length = 0;
     client = this.configuration.newClient({}, { monitorCommands: true });
 

From 13bda33fe296c722d631e10c817710088b429322 Mon Sep 17 00:00:00 2001
From: Neal Beeken <neal.beeken@mongodb.com>
Date: Wed, 26 Mar 2025 14:12:59 -0400
Subject: [PATCH 04/11] test: skip currentTest

---
 test/integration/transactions/transactions.prose.test.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/integration/transactions/transactions.prose.test.ts b/test/integration/transactions/transactions.prose.test.ts
index 99e42675582..f10908cfeb2 100644
--- a/test/integration/transactions/transactions.prose.test.ts
+++ b/test/integration/transactions/transactions.prose.test.ts
@@ -21,8 +21,8 @@ describe('Transactions Spec Prose', function () {
       if (this.currentTest) {
         this.currentTest.skipReason =
           'Transactions on sharded clusters are only supported after 4.2';
+        this.currentTest.skip();
       }
-      this.skip();
     }
     started.length = 0;
     client = this.configuration.newClient({}, { monitorCommands: true });

From 0df4118b652e96c0b4dbf7f540d70e213070f531 Mon Sep 17 00:00:00 2001
From: Neal Beeken <neal.beeken@mongodb.com>
Date: Wed, 26 Mar 2025 15:42:44 -0400
Subject: [PATCH 05/11] test: update version check for sharded cluster
 transactions to include MongoDB <= 4.2

---
 test/integration/transactions/transactions.prose.test.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/integration/transactions/transactions.prose.test.ts b/test/integration/transactions/transactions.prose.test.ts
index f10908cfeb2..eadd63dd12b 100644
--- a/test/integration/transactions/transactions.prose.test.ts
+++ b/test/integration/transactions/transactions.prose.test.ts
@@ -15,7 +15,7 @@ describe('Transactions Spec Prose', function () {
 
   beforeEach(async function () {
     if (
-      semver.satisfies(this.configuration.version, '>4.2') &&
+      semver.satisfies(this.configuration.version, '<=4.2') &&
       this.configuration.topologyType === 'Sharded'
     ) {
       if (this.currentTest) {

From 664cfe99fad252022da41e5b339ea25397abd07e Mon Sep 17 00:00:00 2001
From: Neal Beeken <neal.beeken@mongodb.com>
Date: Wed, 26 Mar 2025 16:28:12 -0400
Subject: [PATCH 06/11] test: fix skipping tests and add optional chaining for
 client methods

---
 test/integration/transactions/transactions.prose.test.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/test/integration/transactions/transactions.prose.test.ts b/test/integration/transactions/transactions.prose.test.ts
index eadd63dd12b..2110137fdb7 100644
--- a/test/integration/transactions/transactions.prose.test.ts
+++ b/test/integration/transactions/transactions.prose.test.ts
@@ -21,7 +21,7 @@ describe('Transactions Spec Prose', function () {
       if (this.currentTest) {
         this.currentTest.skipReason =
           'Transactions on sharded clusters are only supported after 4.2';
-        this.currentTest.skip();
+        this.skip();
       }
     }
     started.length = 0;
@@ -39,11 +39,11 @@ describe('Transactions Spec Prose', function () {
 
   afterEach(async function () {
     await client
-      .db()
+      ?.db()
       .collection('txn-test')
       .drop()
       .catch(() => null);
-    await client.close();
+    await client?.close();
   });
 
   describe('Options Inside Transaction', function () {

From fd5a174c317506ab264f80e26766f9d476a7f7b5 Mon Sep 17 00:00:00 2001
From: Neal Beeken <neal.beeken@mongodb.com>
Date: Thu, 27 Mar 2025 13:25:54 -0400
Subject: [PATCH 07/11] test: ensure transaction test waits for result

---
 .../transactions/transactions.prose.test.ts        | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/test/integration/transactions/transactions.prose.test.ts b/test/integration/transactions/transactions.prose.test.ts
index 2110137fdb7..753e7db55c6 100644
--- a/test/integration/transactions/transactions.prose.test.ts
+++ b/test/integration/transactions/transactions.prose.test.ts
@@ -1,7 +1,7 @@
 import { expect } from 'chai';
 import * as semver from 'semver';
 
-import { type MongoClient } from '../../mongodb';
+import { type MongoClient, type ObjectId } from '../../mongodb';
 
 const metadata: MongoDBMetadataUI = {
   requires: {
@@ -51,16 +51,18 @@ describe('Transactions Spec Prose', function () {
       '1.0 Write concern not inherited from collection object inside transaction.',
       metadata,
       async () => {
+        let _id: ObjectId;
+        const collection = client.db().collection('txn-test', { writeConcern: { w: 0 } });
+
         await client.withSession(async session => {
           session.startTransaction();
-
-          const collection = client.db().collection('txn-test', { writeConcern: { w: 0 } });
-
-          await collection.insertOne({ n: 1 }, { session });
-
+          _id = (await collection.insertOne({ n: 1 }, { session })).insertedId;
           await session.commitTransaction();
         });
 
+        // keep finding until we get a result, otherwise the test will timeout.
+        while ((await collection.findOne({ _id })) == null);
+
         const insertStarted = started.find(ev => ev.commandName === 'insert');
         expect(insertStarted).to.not.have.nested.property('command.writeConcern');
 

From fc9f0e301f58dea19082e46585cae57bd5b5d48b Mon Sep 17 00:00:00 2001
From: Neal Beeken <neal.beeken@mongodb.com>
Date: Mon, 31 Mar 2025 12:37:13 -0400
Subject: [PATCH 08/11] test: update transaction test to assert document
 existence instead of using a loop

---
 test/integration/transactions/transactions.prose.test.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/integration/transactions/transactions.prose.test.ts b/test/integration/transactions/transactions.prose.test.ts
index 753e7db55c6..d1b3404d354 100644
--- a/test/integration/transactions/transactions.prose.test.ts
+++ b/test/integration/transactions/transactions.prose.test.ts
@@ -61,7 +61,7 @@ describe('Transactions Spec Prose', function () {
         });
 
         // keep finding until we get a result, otherwise the test will timeout.
-        while ((await collection.findOne({ _id })) == null);
+        expect(await collection.findOne({ _id })).to.have.property('n', 1);
 
         const insertStarted = started.find(ev => ev.commandName === 'insert');
         expect(insertStarted).to.not.have.nested.property('command.writeConcern');

From bf315dba2604f11906fd5cde1e7297b2e07099d4 Mon Sep 17 00:00:00 2001
From: Neal Beeken <neal.beeken@mongodb.com>
Date: Mon, 31 Mar 2025 16:13:10 -0400
Subject: [PATCH 09/11] chore: add a maxServerVersion to CS test failing on
 latest

---
 .../unified/change-streams-disambiguatedPaths.json               | 1 +
 .../change-streams/unified/change-streams-disambiguatedPaths.yml | 1 +
 2 files changed, 2 insertions(+)

diff --git a/test/spec/change-streams/unified/change-streams-disambiguatedPaths.json b/test/spec/change-streams/unified/change-streams-disambiguatedPaths.json
index a8667b5436c..fccec0caea9 100644
--- a/test/spec/change-streams/unified/change-streams-disambiguatedPaths.json
+++ b/test/spec/change-streams/unified/change-streams-disambiguatedPaths.json
@@ -26,6 +26,7 @@
   "runOnRequirements": [
     {
       "minServerVersion": "6.1.0",
+      "maxServerVersion": "8.1.0",
       "topologies": [
         "replicaset",
         "load-balanced",
diff --git a/test/spec/change-streams/unified/change-streams-disambiguatedPaths.yml b/test/spec/change-streams/unified/change-streams-disambiguatedPaths.yml
index acd05cec4dc..1a657680728 100644
--- a/test/spec/change-streams/unified/change-streams-disambiguatedPaths.yml
+++ b/test/spec/change-streams/unified/change-streams-disambiguatedPaths.yml
@@ -15,6 +15,7 @@ createEntities:
 
 runOnRequirements:
   - minServerVersion: "6.1.0"
+    maxServerVersion: "8.1.0"
     topologies: [ replicaset, sharded-replicaset, load-balanced, sharded ]
     serverless: forbid
 

From bc8202b304a3794c7b0b57ba10f17adb5d55e330 Mon Sep 17 00:00:00 2001
From: Neal Beeken <neal.beeken@mongodb.com>
Date: Wed, 2 Apr 2025 11:22:29 -0400
Subject: [PATCH 10/11] remove changes

---
 .../change-streams-disambiguatedPaths.json    | 66 ++++++++++++++++++-
 .../change-streams-disambiguatedPaths.yml     | 27 +++++++-
 .../unified/change-streams.json               | 12 +---
 .../change-streams/unified/change-streams.yml |  4 +-
 4 files changed, 93 insertions(+), 16 deletions(-)

diff --git a/test/spec/change-streams/unified/change-streams-disambiguatedPaths.json b/test/spec/change-streams/unified/change-streams-disambiguatedPaths.json
index fccec0caea9..91d8e66da20 100644
--- a/test/spec/change-streams/unified/change-streams-disambiguatedPaths.json
+++ b/test/spec/change-streams/unified/change-streams-disambiguatedPaths.json
@@ -26,9 +26,9 @@
   "runOnRequirements": [
     {
       "minServerVersion": "6.1.0",
-      "maxServerVersion": "8.1.0",
       "topologies": [
         "replicaset",
+        "sharded-replicaset",
         "load-balanced",
         "sharded"
       ],
@@ -43,6 +43,70 @@
     }
   ],
   "tests": [
+    {
+      "description": "disambiguatedPaths is not present when showExpandedEvents is false/unset",
+      "operations": [
+        {
+          "name": "insertOne",
+          "object": "collection0",
+          "arguments": {
+            "document": {
+              "_id": 1,
+              "a": {
+                "1": 1
+              }
+            }
+          }
+        },
+        {
+          "name": "createChangeStream",
+          "object": "collection0",
+          "arguments": {
+            "pipeline": []
+          },
+          "saveResultAsEntity": "changeStream0"
+        },
+        {
+          "name": "updateOne",
+          "object": "collection0",
+          "arguments": {
+            "filter": {
+              "_id": 1
+            },
+            "update": {
+              "$set": {
+                "a.1": 2
+              }
+            }
+          }
+        },
+        {
+          "name": "iterateUntilDocumentOrError",
+          "object": "changeStream0",
+          "expectResult": {
+            "operationType": "update",
+            "ns": {
+              "db": "database0",
+              "coll": "collection0"
+            },
+            "updateDescription": {
+              "updatedFields": {
+                "$$exists": true
+              },
+              "removedFields": {
+                "$$exists": true
+              },
+              "truncatedArrays": {
+                "$$exists": true
+              },
+              "disambiguatedPaths": {
+                "$$exists": false
+              }
+            }
+          }
+        }
+      ]
+    },
     {
       "description": "disambiguatedPaths is present on updateDescription when an ambiguous path is present",
       "operations": [
diff --git a/test/spec/change-streams/unified/change-streams-disambiguatedPaths.yml b/test/spec/change-streams/unified/change-streams-disambiguatedPaths.yml
index 1a657680728..a2524d23cee 100644
--- a/test/spec/change-streams/unified/change-streams-disambiguatedPaths.yml
+++ b/test/spec/change-streams/unified/change-streams-disambiguatedPaths.yml
@@ -15,7 +15,6 @@ createEntities:
 
 runOnRequirements:
   - minServerVersion: "6.1.0"
-    maxServerVersion: "8.1.0"
     topologies: [ replicaset, sharded-replicaset, load-balanced, sharded ]
     serverless: forbid
 
@@ -25,6 +24,32 @@ initialData:
     documents: []
 
 tests:
+  - description: "disambiguatedPaths is not present when showExpandedEvents is false/unset"
+    operations:
+      - name: insertOne
+        object: *collection0
+        arguments:
+          document: { _id: 1, 'a': { '1': 1 } }
+      - name: createChangeStream
+        object: *collection0
+        arguments: { pipeline: [] }
+        saveResultAsEntity: &changeStream0 changeStream0
+      - name: updateOne
+        object: *collection0
+        arguments:
+          filter: { _id: 1 }
+          update: { $set: { 'a.1': 2 } }
+      - name: iterateUntilDocumentOrError
+        object: *changeStream0
+        expectResult:
+          operationType: "update"
+          ns: { db: *database0, coll: *collection0 }
+          updateDescription:
+            updatedFields: { $$exists: true }
+            removedFields: { $$exists: true }
+            truncatedArrays: { $$exists: true }
+            disambiguatedPaths: { $$exists: false }
+
   - description: "disambiguatedPaths is present on updateDescription when an ambiguous path is present"
     operations:
       - name: insertOne
diff --git a/test/spec/change-streams/unified/change-streams.json b/test/spec/change-streams/unified/change-streams.json
index a155d85b6e4..c8b60ed4e25 100644
--- a/test/spec/change-streams/unified/change-streams.json
+++ b/test/spec/change-streams/unified/change-streams.json
@@ -181,12 +181,7 @@
                   "field": "array",
                   "newSize": 2
                 }
-              ],
-              "disambiguatedPaths": {
-                "$$unsetOrMatches": {
-                  "$$exists": true
-                }
-              }
+              ]
             }
           }
         }
@@ -1413,11 +1408,6 @@
                 "$$unsetOrMatches": {
                   "$$exists": true
                 }
-              },
-              "disambiguatedPaths": {
-                "$$unsetOrMatches": {
-                  "$$exists": true
-                }
               }
             }
           }
diff --git a/test/spec/change-streams/unified/change-streams.yml b/test/spec/change-streams/unified/change-streams.yml
index 7f824623a67..3235533b5d8 100644
--- a/test/spec/change-streams/unified/change-streams.yml
+++ b/test/spec/change-streams/unified/change-streams.yml
@@ -115,8 +115,7 @@ tests:
                 "field": "array",
                 "newSize": 2
               }
-            ],
-            disambiguatedPaths: { $$unsetOrMatches: { $$exists: true } }
+            ]
           }
         }
 
@@ -723,7 +722,6 @@ tests:
             updatedFields: { x: 2 }
             removedFields: []
             truncatedArrays: { $$unsetOrMatches: { $$exists: true } }
-            disambiguatedPaths: { $$unsetOrMatches: { $$exists: true } }
       - name: iterateUntilDocumentOrError
         object: *changeStream0
         expectResult:

From 80f0c6369366145e23ef94c4918bd909dcf702e3 Mon Sep 17 00:00:00 2001
From: Neal Beeken <neal.beeken@mongodb.com>
Date: Wed, 2 Apr 2025 11:23:18 -0400
Subject: [PATCH 11/11] chore: remove changes

---
 .../change-streams-disambiguatedPaths.json    | 65 -------------------
 .../change-streams-disambiguatedPaths.yml     | 26 --------
 .../unified/change-streams.json               | 12 +++-
 .../change-streams/unified/change-streams.yml |  4 +-
 4 files changed, 14 insertions(+), 93 deletions(-)

diff --git a/test/spec/change-streams/unified/change-streams-disambiguatedPaths.json b/test/spec/change-streams/unified/change-streams-disambiguatedPaths.json
index 91d8e66da20..a8667b5436c 100644
--- a/test/spec/change-streams/unified/change-streams-disambiguatedPaths.json
+++ b/test/spec/change-streams/unified/change-streams-disambiguatedPaths.json
@@ -28,7 +28,6 @@
       "minServerVersion": "6.1.0",
       "topologies": [
         "replicaset",
-        "sharded-replicaset",
         "load-balanced",
         "sharded"
       ],
@@ -43,70 +42,6 @@
     }
   ],
   "tests": [
-    {
-      "description": "disambiguatedPaths is not present when showExpandedEvents is false/unset",
-      "operations": [
-        {
-          "name": "insertOne",
-          "object": "collection0",
-          "arguments": {
-            "document": {
-              "_id": 1,
-              "a": {
-                "1": 1
-              }
-            }
-          }
-        },
-        {
-          "name": "createChangeStream",
-          "object": "collection0",
-          "arguments": {
-            "pipeline": []
-          },
-          "saveResultAsEntity": "changeStream0"
-        },
-        {
-          "name": "updateOne",
-          "object": "collection0",
-          "arguments": {
-            "filter": {
-              "_id": 1
-            },
-            "update": {
-              "$set": {
-                "a.1": 2
-              }
-            }
-          }
-        },
-        {
-          "name": "iterateUntilDocumentOrError",
-          "object": "changeStream0",
-          "expectResult": {
-            "operationType": "update",
-            "ns": {
-              "db": "database0",
-              "coll": "collection0"
-            },
-            "updateDescription": {
-              "updatedFields": {
-                "$$exists": true
-              },
-              "removedFields": {
-                "$$exists": true
-              },
-              "truncatedArrays": {
-                "$$exists": true
-              },
-              "disambiguatedPaths": {
-                "$$exists": false
-              }
-            }
-          }
-        }
-      ]
-    },
     {
       "description": "disambiguatedPaths is present on updateDescription when an ambiguous path is present",
       "operations": [
diff --git a/test/spec/change-streams/unified/change-streams-disambiguatedPaths.yml b/test/spec/change-streams/unified/change-streams-disambiguatedPaths.yml
index a2524d23cee..acd05cec4dc 100644
--- a/test/spec/change-streams/unified/change-streams-disambiguatedPaths.yml
+++ b/test/spec/change-streams/unified/change-streams-disambiguatedPaths.yml
@@ -24,32 +24,6 @@ initialData:
     documents: []
 
 tests:
-  - description: "disambiguatedPaths is not present when showExpandedEvents is false/unset"
-    operations:
-      - name: insertOne
-        object: *collection0
-        arguments:
-          document: { _id: 1, 'a': { '1': 1 } }
-      - name: createChangeStream
-        object: *collection0
-        arguments: { pipeline: [] }
-        saveResultAsEntity: &changeStream0 changeStream0
-      - name: updateOne
-        object: *collection0
-        arguments:
-          filter: { _id: 1 }
-          update: { $set: { 'a.1': 2 } }
-      - name: iterateUntilDocumentOrError
-        object: *changeStream0
-        expectResult:
-          operationType: "update"
-          ns: { db: *database0, coll: *collection0 }
-          updateDescription:
-            updatedFields: { $$exists: true }
-            removedFields: { $$exists: true }
-            truncatedArrays: { $$exists: true }
-            disambiguatedPaths: { $$exists: false }
-
   - description: "disambiguatedPaths is present on updateDescription when an ambiguous path is present"
     operations:
       - name: insertOne
diff --git a/test/spec/change-streams/unified/change-streams.json b/test/spec/change-streams/unified/change-streams.json
index c8b60ed4e25..a155d85b6e4 100644
--- a/test/spec/change-streams/unified/change-streams.json
+++ b/test/spec/change-streams/unified/change-streams.json
@@ -181,7 +181,12 @@
                   "field": "array",
                   "newSize": 2
                 }
-              ]
+              ],
+              "disambiguatedPaths": {
+                "$$unsetOrMatches": {
+                  "$$exists": true
+                }
+              }
             }
           }
         }
@@ -1408,6 +1413,11 @@
                 "$$unsetOrMatches": {
                   "$$exists": true
                 }
+              },
+              "disambiguatedPaths": {
+                "$$unsetOrMatches": {
+                  "$$exists": true
+                }
               }
             }
           }
diff --git a/test/spec/change-streams/unified/change-streams.yml b/test/spec/change-streams/unified/change-streams.yml
index 3235533b5d8..7f824623a67 100644
--- a/test/spec/change-streams/unified/change-streams.yml
+++ b/test/spec/change-streams/unified/change-streams.yml
@@ -115,7 +115,8 @@ tests:
                 "field": "array",
                 "newSize": 2
               }
-            ]
+            ],
+            disambiguatedPaths: { $$unsetOrMatches: { $$exists: true } }
           }
         }
 
@@ -722,6 +723,7 @@ tests:
             updatedFields: { x: 2 }
             removedFields: []
             truncatedArrays: { $$unsetOrMatches: { $$exists: true } }
+            disambiguatedPaths: { $$unsetOrMatches: { $$exists: true } }
       - name: iterateUntilDocumentOrError
         object: *changeStream0
         expectResult: