diff --git a/source/transactions/tests/unified/mongos-recovery-token.json b/source/transactions/tests/unified/mongos-recovery-token.json
index 00909c4218..bb88aa16bd 100644
--- a/source/transactions/tests/unified/mongos-recovery-token.json
+++ b/source/transactions/tests/unified/mongos-recovery-token.json
@@ -232,7 +232,8 @@
                   "id": "client1",
                   "useMultipleMongoses": true,
                   "uriOptions": {
-                    "heartbeatFrequencyMS": 30000
+                    "heartbeatFrequencyMS": 30000,
+                    "appName": "transactionsClient"
                   },
                   "observeEvents": [
                     "commandStartedEvent"
@@ -299,7 +300,8 @@
                   "isMaster",
                   "hello"
                 ],
-                "closeConnection": true
+                "closeConnection": true,
+                "appName": "transactionsClient"
               }
             }
           }
diff --git a/source/transactions/tests/unified/mongos-recovery-token.yml b/source/transactions/tests/unified/mongos-recovery-token.yml
index f8606f0782..9eed826ec5 100644
--- a/source/transactions/tests/unified/mongos-recovery-token.yml
+++ b/source/transactions/tests/unified/mongos-recovery-token.yml
@@ -150,6 +150,7 @@ tests:
                   # flight heartbeat refreshes the first mongoes' SDAM state in between
                   # the initial commitTransaction and the retry attempt.
                   heartbeatFrequencyMS: 30000
+                  appName: &appName transactionsClient
                 observeEvents:
                   - commandStartedEvent
             - database:
@@ -195,6 +196,7 @@ tests:
                 - isMaster
                 - hello
               closeConnection: true
+              appName: *appName
       # The first commitTransaction sees a retryable connection error due to
       # the fail point and also fails on the server. The retry attempt on a
       # new mongos will wait for the transaction to timeout and will fail
diff --git a/source/transactions/tests/unified/pin-mongos.json b/source/transactions/tests/unified/pin-mongos.json
index 5f2ecca5c1..c96f3f341f 100644
--- a/source/transactions/tests/unified/pin-mongos.json
+++ b/source/transactions/tests/unified/pin-mongos.json
@@ -1249,7 +1249,8 @@
                   "id": "client1",
                   "useMultipleMongoses": true,
                   "uriOptions": {
-                    "heartbeatFrequencyMS": 30000
+                    "heartbeatFrequencyMS": 30000,
+                    "appName": "transactionsClient"
                   },
                   "observeEvents": [
                     "commandStartedEvent"
@@ -1316,7 +1317,8 @@
                   "isMaster",
                   "hello"
                 ],
-                "closeConnection": true
+                "closeConnection": true,
+                "appName": "transactionsClient"
               }
             }
           }
diff --git a/source/transactions/tests/unified/pin-mongos.yml b/source/transactions/tests/unified/pin-mongos.yml
index 596dc2d00d..4869ac3c16 100644
--- a/source/transactions/tests/unified/pin-mongos.yml
+++ b/source/transactions/tests/unified/pin-mongos.yml
@@ -527,6 +527,7 @@ tests:
                   # flight heartbeat refreshes the first mongoes' SDAM state in between
                   # the insert connection error and the single commit attempt.
                   heartbeatFrequencyMS: 30000
+                  appName: &appName transactionsClient
                 observeEvents:
                   - commandStartedEvent
             - database:
@@ -572,6 +573,7 @@ tests:
                 - isMaster
                 - hello
               closeConnection: true
+              appName: *appName
       -
         object: *collection1
         name: insertOne