diff --git a/source/crud/tests/unified/aggregate-write-readPreference.json b/source/crud/tests/unified/aggregate-write-readPreference.json
index bc887e83c..206b38070 100644
--- a/source/crud/tests/unified/aggregate-write-readPreference.json
+++ b/source/crud/tests/unified/aggregate-write-readPreference.json
@@ -78,11 +78,6 @@
           "x": 33
         }
       ]
-    },
-    {
-      "collectionName": "coll1",
-      "databaseName": "db0",
-      "documents": []
     }
   ],
   "tests": [
diff --git a/source/crud/tests/unified/aggregate-write-readPreference.yml b/source/crud/tests/unified/aggregate-write-readPreference.yml
index 86f5a4399..16f103575 100644
--- a/source/crud/tests/unified/aggregate-write-readPreference.yml
+++ b/source/crud/tests/unified/aggregate-write-readPreference.yml
@@ -51,9 +51,6 @@ initialData:
       - { _id: 1, x: 11 }
       - { _id: 2, x: 22 }
       - { _id: 3, x: 33 }
-  - collectionName: *collection1Name
-    databaseName: *database0Name
-    documents: []
 
 tests:
   - description: "Aggregate with $out includes read preference for 5.0+ server"
@@ -78,12 +75,6 @@ tests:
                 $readPreference: *readPreference
                 readConcern: *readConcern
                 writeConcern: *writeConcern
-    outcome: &outcome
-      - collectionName: *collection1Name
-        databaseName: *database0Name
-        documents:
-          - { _id: 2, x: 22 }
-          - { _id: 3, x: 33 }
 
   - description: "Aggregate with $out omits read preference for pre-5.0 server"
     runOnRequirements:
@@ -108,7 +99,6 @@ tests:
                 $readPreference: { $$exists: false }
                 readConcern: *readConcern
                 writeConcern: *writeConcern
-    outcome: *outcome
 
   - description: "Aggregate with $merge includes read preference for 5.0+ server"
     runOnRequirements:
@@ -131,7 +121,6 @@ tests:
                 $readPreference: *readPreference
                 readConcern: *readConcern
                 writeConcern: *writeConcern
-    outcome: *outcome
 
   - description: "Aggregate with $merge omits read preference for pre-5.0 server"
     runOnRequirements:
@@ -152,4 +141,3 @@ tests:
                 $readPreference: { $$exists: false }
                 readConcern: *readConcern
                 writeConcern: *writeConcern
-    outcome: *outcome
diff --git a/source/crud/tests/unified/db-aggregate-write-readPreference.json b/source/crud/tests/unified/db-aggregate-write-readPreference.json
index 2a81282de..df5b4f135 100644
--- a/source/crud/tests/unified/db-aggregate-write-readPreference.json
+++ b/source/crud/tests/unified/db-aggregate-write-readPreference.json
@@ -52,13 +52,6 @@
       }
     }
   ],
-  "initialData": [
-    {
-      "collectionName": "coll0",
-      "databaseName": "db0",
-      "documents": []
-    }
-  ],
   "tests": [
     {
       "description": "Database-level aggregate with $out includes read preference for 5.0+ server",
diff --git a/source/crud/tests/unified/db-aggregate-write-readPreference.yml b/source/crud/tests/unified/db-aggregate-write-readPreference.yml
index 04a3b2169..ca918ca7f 100644
--- a/source/crud/tests/unified/db-aggregate-write-readPreference.yml
+++ b/source/crud/tests/unified/db-aggregate-write-readPreference.yml
@@ -43,11 +43,6 @@ createEntities:
       database: *database0
       collectionName: &collection0Name coll0
 
-initialData:
-  - collectionName: *collection0Name
-    databaseName: *database0Name
-    documents: []
-
 tests:
   - description: "Database-level aggregate with $out includes read preference for 5.0+ server"
     runOnRequirements: