diff --git a/driver-core/src/test/resources/unified-test-format/crud/aggregate-write-readPreference.json b/driver-core/src/test/resources/unified-test-format/crud/aggregate-write-readPreference.json
index bc887e83cbc..c1fa3b4574a 100644
--- a/driver-core/src/test/resources/unified-test-format/crud/aggregate-write-readPreference.json
+++ b/driver-core/src/test/resources/unified-test-format/crud/aggregate-write-readPreference.json
@@ -78,11 +78,6 @@
           "x": 33
         }
       ]
-    },
-    {
-      "collectionName": "coll1",
-      "databaseName": "db0",
-      "documents": []
     }
   ],
   "tests": [
@@ -159,22 +154,6 @@
             }
           ]
         }
-      ],
-      "outcome": [
-        {
-          "collectionName": "coll1",
-          "databaseName": "db0",
-          "documents": [
-            {
-              "_id": 2,
-              "x": 22
-            },
-            {
-              "_id": 3,
-              "x": 33
-            }
-          ]
-        }
       ]
     },
     {
@@ -250,22 +229,6 @@
             }
           ]
         }
-      ],
-      "outcome": [
-        {
-          "collectionName": "coll1",
-          "databaseName": "db0",
-          "documents": [
-            {
-              "_id": 2,
-              "x": 22
-            },
-            {
-              "_id": 3,
-              "x": 33
-            }
-          ]
-        }
       ]
     },
     {
@@ -344,22 +307,6 @@
             }
           ]
         }
-      ],
-      "outcome": [
-        {
-          "collectionName": "coll1",
-          "databaseName": "db0",
-          "documents": [
-            {
-              "_id": 2,
-              "x": 22
-            },
-            {
-              "_id": 3,
-              "x": 33
-            }
-          ]
-        }
       ]
     },
     {
@@ -438,22 +385,6 @@
             }
           ]
         }
-      ],
-      "outcome": [
-        {
-          "collectionName": "coll1",
-          "databaseName": "db0",
-          "documents": [
-            {
-              "_id": 2,
-              "x": 22
-            },
-            {
-              "_id": 3,
-              "x": 33
-            }
-          ]
-        }
       ]
     }
   ]
diff --git a/driver-core/src/test/resources/unified-test-format/crud/db-aggregate-write-readPreference.json b/driver-core/src/test/resources/unified-test-format/crud/db-aggregate-write-readPreference.json
index 2a81282de81..b6460f001f2 100644
--- a/driver-core/src/test/resources/unified-test-format/crud/db-aggregate-write-readPreference.json
+++ b/driver-core/src/test/resources/unified-test-format/crud/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",
@@ -141,17 +134,6 @@
             }
           ]
         }
-      ],
-      "outcome": [
-        {
-          "collectionName": "coll0",
-          "databaseName": "db0",
-          "documents": [
-            {
-              "_id": 1
-            }
-          ]
-        }
       ]
     },
     {
@@ -235,17 +217,6 @@
             }
           ]
         }
-      ],
-      "outcome": [
-        {
-          "collectionName": "coll0",
-          "databaseName": "db0",
-          "documents": [
-            {
-              "_id": 1
-            }
-          ]
-        }
       ]
     },
     {
@@ -332,17 +303,6 @@
             }
           ]
         }
-      ],
-      "outcome": [
-        {
-          "collectionName": "coll0",
-          "databaseName": "db0",
-          "documents": [
-            {
-              "_id": 1
-            }
-          ]
-        }
       ]
     },
     {
@@ -429,17 +389,6 @@
             }
           ]
         }
-      ],
-      "outcome": [
-        {
-          "collectionName": "coll0",
-          "databaseName": "db0",
-          "documents": [
-            {
-              "_id": 1
-            }
-          ]
-        }
       ]
     }
   ]