diff --git a/.evergreen/config.in.yml b/.evergreen/config.in.yml
index 2b5fa1eada..29587cdc52 100644
--- a/.evergreen/config.in.yml
+++ b/.evergreen/config.in.yml
@@ -50,6 +50,19 @@ functions:
       params:
         file: src/expansion.yml
 
+  "switch source":
+    # Checkout the desired source revision if specified
+    - command: shell.exec
+      params:
+        working_dir: src
+        shell: bash
+        script: |
+          set -euxo pipefail
+          git reset --hard HEAD
+          git fetch origin "${SOURCE_REV}"
+          git checkout "${SOURCE_REV}"
+          npm i
+
   "bootstrap mongo-orchestration":
     - command: subprocess.exec
       params:
@@ -703,6 +716,26 @@ functions:
         args:
           - .evergreen/docker/alpine.sh
 
+  "log state":
+    - command: shell.exec
+      params:
+        working_dir: "src"
+        shell: bash
+        script: |-
+          set -o errexit
+          set -o pipefail
+
+          echo "=== Driver state ==="
+          echo "Current commit:"
+          git rev-parse HEAD
+          echo
+          echo "Current branch / status:"
+          git status --short --branch || true
+          echo
+          echo "npm ls (full):"
+          npm ls
+          echo "=== end log state ==="
+
 tasks:
   - name: "test-gcpkms-task"
     commands:
@@ -955,6 +988,93 @@ tasks:
           args:
             - .evergreen/run-search-index-management-tests.sh
 
+  - name: test-bson-latest-driver-7.0.0-unit-tests
+    commands:
+      - command: expansions.update
+        type: setup
+        params:
+          updates:
+            - { key: VERSION, value: latest }
+            - { key: NODE_LTS_VERSION, value: "20.19.0" }
+      - func: install dependencies
+      - func: switch source
+        vars:
+          SOURCE_REV: refs/tags/v7.0.0
+      - func: install package
+        vars:
+          PACKAGE: https://github.com/mongodb/js-bson#HEAD
+      - func: log state
+      - func: run unit tests
+
+  - name: test-bson-latest-driver-7.0.0-server-tests
+    commands:
+      - command: expansions.update
+        type: setup
+        params:
+          updates:
+            - { key: VERSION, value: latest }
+            - { key: TOPOLOGY, value: server }
+            - { key: AUTH, value: auth }
+            - { key: SSL, value: nossl }
+            - { key: CLIENT_ENCRYPTION, value: "false" }
+            - { key: NODE_LTS_VERSION, value: "20.19.0" }
+      - func: install dependencies
+      - func: bootstrap mongo-orchestration
+      - func: switch source
+        vars:
+          SOURCE_REV: refs/tags/v7.0.0
+      - func: install package
+        vars:
+          PACKAGE: https://github.com/mongodb/js-bson#HEAD
+      - func: log state
+      - func: run tests
+
+  - name: test-bson-latest-driver-7.0.0-replica_set-tests
+    commands:
+      - command: expansions.update
+        type: setup
+        params:
+          updates:
+            - { key: VERSION, value: latest }
+            - { key: TOPOLOGY, value: replica_set }
+            - { key: AUTH, value: auth }
+            - { key: SSL, value: nossl }
+            - { key: CLIENT_ENCRYPTION, value: "false" }
+            - { key: NODE_LTS_VERSION, value: "20.19.0" }
+      - func: install dependencies
+      - func: bootstrap mongo-orchestration
+      - func: switch source
+        vars:
+          SOURCE_REV: refs/tags/v7.0.0
+      - func: install package
+        vars:
+          PACKAGE: https://github.com/mongodb/js-bson#HEAD
+      - func: log state
+      - func: run tests
+
+  - name: test-bson-latest-driver-7.0.0-sharded_cluster-tests
+    commands:
+      - command: expansions.update
+        type: setup
+        params:
+          updates:
+            - { key: VERSION, value: latest }
+            - { key: TOPOLOGY, value: sharded_cluster }
+            - { key: AUTH, value: auth }
+            - { key: SSL, value: nossl }
+            - { key: CLIENT_ENCRYPTION, value: "false" }
+            - { key: NODE_LTS_VERSION, value: "20.19.0" }
+      - func: install dependencies
+      - func: bootstrap mongo-orchestration
+      - func: switch source
+        vars:
+          SOURCE_REV: refs/tags/v7.0.0
+      - func: install package
+        vars:
+          PACKAGE: https://github.com/mongodb/js-bson#HEAD
+      - func: log state
+      - func: run tests
+
 task_groups:
   - name: test_gcpkms_task_group
     setup_group_can_fail_task: true
@@ -1237,3 +1357,11 @@ buildvariants:
     run_on: ubuntu2204-small
     tasks:
       - .alpine-fle
+  - name: BSON compatibility tests
+    display_name: BSON compatibility tests
+    run_on: rhel80-large
+    tasks:
+      - test-bson-latest-driver-7.0.0-unit-tests
+      - test-bson-latest-driver-7.0.0-server-tests
+      - test-bson-latest-driver-7.0.0-replica_set-tests
+      - test-bson-latest-driver-7.0.0-sharded_cluster-tests
diff --git a/.evergreen/config.yml b/.evergreen/config.yml
index 399010513e..d357b5e855 100644
--- a/.evergreen/config.yml
+++ b/.evergreen/config.yml
@@ -29,6 +29,17 @@ functions:
     - command: expansions.update
       params:
         file: src/expansion.yml
+  switch source:
+    - command: shell.exec
+      params:
+        working_dir: src
+        shell: bash
+        script: |
+          set -euxo pipefail
+          git reset --hard HEAD
+          git fetch origin "${SOURCE_REV}"
+          git checkout "${SOURCE_REV}"
+          npm i
   bootstrap mongo-orchestration:
     - command: subprocess.exec
       params:
@@ -639,6 +650,25 @@ functions:
         add_expansions_to_env: true
         args:
           - .evergreen/docker/alpine.sh
+  log state:
+    - command: shell.exec
+      params:
+        working_dir: src
+        shell: bash
+        script: |-
+          set -o errexit
+          set -o pipefail
+
+          echo "=== Driver state ==="
+          echo "Current commit:"
+          git rev-parse HEAD
+          echo
+          echo "Current branch / status:"
+          git status --short --branch || true
+          echo
+          echo "npm ls (full):"
+          npm ls
+          echo "=== end log state ==="
 tasks:
   - name: test-gcpkms-task
     commands:
@@ -882,6 +912,89 @@ tasks:
           add_expansions_to_env: true
           args:
             - .evergreen/run-search-index-management-tests.sh
+  - name: test-bson-latest-driver-7.0.0-unit-tests
+    commands:
+      - command: expansions.update
+        type: setup
+        params:
+          updates:
+            - {key: VERSION, value: latest}
+            - {key: NODE_LTS_VERSION, value: 20.19.0}
+      - func: install dependencies
+      - func: switch source
+        vars:
+          SOURCE_REV: refs/tags/v7.0.0
+      - func: install package
+        vars:
+          PACKAGE: https://github.com/mongodb/js-bson#HEAD
+      - func: log state
+      - func: run unit tests
+  - name: test-bson-latest-driver-7.0.0-server-tests
+    commands:
+      - command: expansions.update
+        type: setup
+        params:
+          updates:
+            - {key: VERSION, value: latest}
+            - {key: TOPOLOGY, value: server}
+            - {key: AUTH, value: auth}
+            - {key: SSL, value: nossl}
+            - {key: CLIENT_ENCRYPTION, value: 'false'}
+            - {key: NODE_LTS_VERSION, value: 20.19.0}
+      - func: install dependencies
+      - func: bootstrap mongo-orchestration
+      - func: switch source
+        vars:
+          SOURCE_REV: refs/tags/v7.0.0
+      - func: install package
+        vars:
+          PACKAGE: https://github.com/mongodb/js-bson#HEAD
+      - func: log state
+      - func: run tests
+  - name: test-bson-latest-driver-7.0.0-replica_set-tests
+    commands:
+      - command: expansions.update
+        type: setup
+        params:
+          updates:
+            - {key: VERSION, value: latest}
+            - {key: TOPOLOGY, value: replica_set}
+            - {key: AUTH, value: auth}
+            - {key: SSL, value: nossl}
+            - {key: CLIENT_ENCRYPTION, value: 'false'}
+            - {key: NODE_LTS_VERSION, value: 20.19.0}
+      - func: install dependencies
+      - func: bootstrap mongo-orchestration
+      - func: switch source
+        vars:
+          SOURCE_REV: refs/tags/v7.0.0
+      - func: install package
+        vars:
+          PACKAGE: https://github.com/mongodb/js-bson#HEAD
+      - func: log state
+      - func: run tests
+  - name: test-bson-latest-driver-7.0.0-sharded_cluster-tests
+    commands:
+      - command: expansions.update
+        type: setup
+        params:
+          updates:
+            - {key: VERSION, value: latest}
+            - {key: TOPOLOGY, value: sharded_cluster}
+            - {key: AUTH, value: auth}
+            - {key: SSL, value: nossl}
+            - {key: CLIENT_ENCRYPTION, value: 'false'}
+            - {key: NODE_LTS_VERSION, value: 20.19.0}
+      - func: install dependencies
+      - func: bootstrap mongo-orchestration
+      - func: switch source
+        vars:
+          SOURCE_REV: refs/tags/v7.0.0
+      - func: install package
+        vars:
+          PACKAGE: https://github.com/mongodb/js-bson#HEAD
+      - func: log state
+      - func: run tests
   - name: test-latest-server
     tags:
       - latest
@@ -3386,6 +3499,14 @@ buildvariants:
     run_on: ubuntu2204-small
     tasks:
       - .alpine-fle
+  - name: BSON compatibility tests
+    display_name: BSON compatibility tests
+    run_on: rhel80-large
+    tasks:
+      - test-bson-latest-driver-7.0.0-unit-tests
+      - test-bson-latest-driver-7.0.0-server-tests
+      - test-bson-latest-driver-7.0.0-replica_set-tests
+      - test-bson-latest-driver-7.0.0-sharded_cluster-tests
   - name: rhel80-large-iron
     display_name: rhel8 Node20.19.0
     run_on: rhel80-large