diff --git a/source/server-discovery-and-monitoring/tests/unified/serverMonitoringMode.json b/source/server-discovery-and-monitoring/tests/unified/serverMonitoringMode.json
index 20bf19155b..7d681b4f9e 100644
--- a/source/server-discovery-and-monitoring/tests/unified/serverMonitoringMode.json
+++ b/source/server-discovery-and-monitoring/tests/unified/serverMonitoringMode.json
@@ -16,7 +16,7 @@
       "description": "connect with serverMonitoringMode=auto >=4.4",
       "runOnRequirements": [
         {
-          "minServerVersion": "4.4"
+          "minServerVersion": "4.4.0"
         }
       ],
       "operations": [
@@ -99,11 +99,99 @@
         }
       ]
     },
+    {
+      "description": "connect with serverMonitoringMode=auto <4.4",
+      "runOnRequirements": [
+        {
+          "maxServerVersion": "4.2.99"
+        }
+      ],
+      "operations": [
+        {
+          "name": "createEntities",
+          "object": "testRunner",
+          "arguments": {
+            "entities": [
+              {
+                "client": {
+                  "id": "client",
+                  "uriOptions": {
+                    "serverMonitoringMode": "auto",
+                    "heartbeatFrequencyMS": 500
+                  },
+                  "useMultipleMongoses": false,
+                  "observeEvents": [
+                    "serverHeartbeatStartedEvent",
+                    "serverHeartbeatSucceededEvent",
+                    "serverHeartbeatFailedEvent"
+                  ]
+                }
+              },
+              {
+                "database": {
+                  "id": "db",
+                  "client": "client",
+                  "databaseName": "sdam-tests"
+                }
+              }
+            ]
+          }
+        },
+        {
+          "name": "runCommand",
+          "object": "db",
+          "arguments": {
+            "commandName": "ping",
+            "command": {
+              "ping": 1
+            }
+          },
+          "expectResult": {
+            "ok": 1
+          }
+        },
+        {
+          "name": "waitForEvent",
+          "object": "testRunner",
+          "arguments": {
+            "client": "client",
+            "event": {
+              "serverHeartbeatStartedEvent": {}
+            },
+            "count": 2
+          }
+        }
+      ],
+      "expectEvents": [
+        {
+          "client": "client",
+          "eventType": "sdam",
+          "ignoreExtraEvents": true,
+          "events": [
+            {
+              "serverHeartbeatStartedEvent": {
+                "awaited": false
+              }
+            },
+            {
+              "serverHeartbeatSucceededEvent": {
+                "awaited": false
+              }
+            },
+            {
+              "serverHeartbeatStartedEvent": {
+                "awaited": false
+              }
+            }
+          ]
+        }
+      ]
+    },
     {
       "description": "connect with serverMonitoringMode=stream >=4.4",
       "runOnRequirements": [
         {
-          "minServerVersion": "4.4"
+          "minServerVersion": "4.4.0"
         }
       ],
       "operations": [
@@ -186,6 +274,94 @@
         }
       ]
     },
+    {
+      "description": "connect with serverMonitoringMode=stream <4.4",
+      "runOnRequirements": [
+        {
+          "maxServerVersion": "4.2.99"
+        }
+      ],
+      "operations": [
+        {
+          "name": "createEntities",
+          "object": "testRunner",
+          "arguments": {
+            "entities": [
+              {
+                "client": {
+                  "id": "client",
+                  "uriOptions": {
+                    "serverMonitoringMode": "stream",
+                    "heartbeatFrequencyMS": 500
+                  },
+                  "useMultipleMongoses": false,
+                  "observeEvents": [
+                    "serverHeartbeatStartedEvent",
+                    "serverHeartbeatSucceededEvent",
+                    "serverHeartbeatFailedEvent"
+                  ]
+                }
+              },
+              {
+                "database": {
+                  "id": "db",
+                  "client": "client",
+                  "databaseName": "sdam-tests"
+                }
+              }
+            ]
+          }
+        },
+        {
+          "name": "runCommand",
+          "object": "db",
+          "arguments": {
+            "commandName": "ping",
+            "command": {
+              "ping": 1
+            }
+          },
+          "expectResult": {
+            "ok": 1
+          }
+        },
+        {
+          "name": "waitForEvent",
+          "object": "testRunner",
+          "arguments": {
+            "client": "client",
+            "event": {
+              "serverHeartbeatStartedEvent": {}
+            },
+            "count": 2
+          }
+        }
+      ],
+      "expectEvents": [
+        {
+          "client": "client",
+          "eventType": "sdam",
+          "ignoreExtraEvents": true,
+          "events": [
+            {
+              "serverHeartbeatStartedEvent": {
+                "awaited": false
+              }
+            },
+            {
+              "serverHeartbeatSucceededEvent": {
+                "awaited": false
+              }
+            },
+            {
+              "serverHeartbeatStartedEvent": {
+                "awaited": false
+              }
+            }
+          ]
+        }
+      ]
+    },
     {
       "description": "connect with serverMonitoringMode=poll",
       "operations": [
diff --git a/source/server-discovery-and-monitoring/tests/unified/serverMonitoringMode.yml b/source/server-discovery-and-monitoring/tests/unified/serverMonitoringMode.yml
index eae0a3aeea..28c7853d04 100644
--- a/source/server-discovery-and-monitoring/tests/unified/serverMonitoringMode.yml
+++ b/source/server-discovery-and-monitoring/tests/unified/serverMonitoringMode.yml
@@ -10,7 +10,7 @@ runOnRequirements:
 tests:
   - description: "connect with serverMonitoringMode=auto >=4.4"
     runOnRequirements:
-      - minServerVersion: "4.4"
+      - minServerVersion: "4.4.0"
     operations:
       - name: createEntities
         object: testRunner
@@ -57,9 +57,46 @@ tests:
           - serverHeartbeatStartedEvent:
               awaited: True
 
+  - description: "connect with serverMonitoringMode=auto <4.4"
+    runOnRequirements:
+      - maxServerVersion: "4.2.99"
+    operations:
+      - name: createEntities
+        object: testRunner
+        arguments:
+          entities:
+            - client:
+                id: client
+                uriOptions:
+                  serverMonitoringMode: "auto"
+                  heartbeatFrequencyMS: 500
+                useMultipleMongoses: false
+                observeEvents:
+                  - serverHeartbeatStartedEvent
+                  - serverHeartbeatSucceededEvent
+                  - serverHeartbeatFailedEvent
+            - database:
+                id: db
+                client: client
+                databaseName: sdam-tests
+      - *ping
+      # Wait for the second serverHeartbeatStartedEvent to ensure we do not stream.
+      - *waitForSecondHeartbeatStarted
+    expectEvents: &pollingStartedEvents
+      - client: client
+        eventType: sdam
+        ignoreExtraEvents: true
+        events:
+          - serverHeartbeatStartedEvent:
+              awaited: False
+          - serverHeartbeatSucceededEvent:
+              awaited: False
+          - serverHeartbeatStartedEvent:
+              awaited: False
+
   - description: "connect with serverMonitoringMode=stream >=4.4"
     runOnRequirements:
-      - minServerVersion: "4.4"
+      - minServerVersion: "4.4.0"
     operations:
       - name: createEntities
         object: testRunner
@@ -83,6 +120,33 @@ tests:
       - *waitForSecondHeartbeatStarted
     expectEvents: *streamingStartedEvents
 
+  - description: "connect with serverMonitoringMode=stream <4.4"
+    runOnRequirements:
+      - maxServerVersion: "4.2.99"
+    operations:
+      - name: createEntities
+        object: testRunner
+        arguments:
+          entities:
+            - client:
+                id: client
+                uriOptions:
+                  serverMonitoringMode: "stream"
+                  heartbeatFrequencyMS: 500
+                useMultipleMongoses: false
+                observeEvents:
+                  - serverHeartbeatStartedEvent
+                  - serverHeartbeatSucceededEvent
+                  - serverHeartbeatFailedEvent
+            - database:
+                id: db
+                client: client
+                databaseName: sdam-tests
+      - *ping
+      # Wait for the second serverHeartbeatStartedEvent to ensure we do not stream.
+      - *waitForSecondHeartbeatStarted
+    expectEvents: *pollingStartedEvents
+
   - description: "connect with serverMonitoringMode=poll"
     operations:
       - name: createEntities
@@ -106,14 +170,4 @@ tests:
       - *ping
       # Wait for the second serverHeartbeatStartedEvent to ensure we do not stream.
       - *waitForSecondHeartbeatStarted
-    expectEvents: &pollingStartedEvents
-      - client: client
-        eventType: sdam
-        ignoreExtraEvents: true
-        events:
-          - serverHeartbeatStartedEvent:
-              awaited: False
-          - serverHeartbeatSucceededEvent:
-              awaited: False
-          - serverHeartbeatStartedEvent:
-              awaited: False
+    expectEvents: *pollingStartedEvents