diff --git a/.github/workflows/production-deploy.yml b/.github/workflows/production-deploy.yml
index 92570dd..012eb0c 100644
--- a/.github/workflows/production-deploy.yml
+++ b/.github/workflows/production-deploy.yml
@@ -42,7 +42,7 @@ jobs:
       environment: "production"
       version-bump: ${{ inputs.version-bump }}
       branch: ${{ inputs.branch }}
-      run-database-tests: false
+      run-database-tests: true
       seed: ${{ inputs.seed }}
       request_delay: ${{ inputs.request_delay }}
       max_concurrency: ${{ inputs.max_concurrency }}
diff --git a/.github/workflows/staging-deploy.yml b/.github/workflows/staging-deploy.yml
index d294a28..5f02c0d 100644
--- a/.github/workflows/staging-deploy.yml
+++ b/.github/workflows/staging-deploy.yml
@@ -7,58 +7,62 @@ on:
   workflow_dispatch:
 
 jobs:
-#  test:
-#    name: Test
-#    runs-on: ubuntu-latest
-#    permissions:
-#      contents: read
-#      actions: read
-#      checks: write
-#      pull-requests: write
-#    strategy:
-#      fail-fast: false
-#      matrix:
-#        python-version: ["3.8"]
-#    steps:
-#      - name: Checkout
-#        uses: actions/checkout@v4
-#      - name: Set up Python ${{ matrix.python-version }}
-#        id: python-setup
-#        uses: actions/setup-python@v5
-#        with:
-#          python-version: ${{ matrix.python-version }}
-#
-#      - name: Install dependencies
-#        run: |
-#          python -m venv .venv
-#          .venv/bin/pip install pytest
-#          .venv/bin/pip install -r app/requirements.txt
-#
-#
-#      - name: Lint with flake8
-#        run: |
-#          source .venv/bin/activate
-#          .venv/bin/pip install flake8
-#          # stop the build if there are Python syntax errors or undefined names
-#          flake8 ./app --count --select=E9,F63,F7,F82 --show-source --statistics
-#          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-#          flake8 ./app --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-#
-#      - name: Run tests
-#        if: always()
-#        run: |
-#          source .venv/bin/activate
-#          pytest --junit-xml=./reports/pytest.xml --tb=auto -v
-#
-#      - name: Upload test results
-#        uses: actions/upload-artifact@v4
-#        if: always()
-#        with:
-#          name: test-results-${{ matrix.python-version }}
-#          path: ./reports/pytest.xml
-#          if-no-files-found: warn
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      actions: read
+      checks: write
+      pull-requests: write
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.12"]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        id: python-setup
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: |
+          python -m venv .venv
+          .venv/bin/pip install pytest
+          .venv/bin/pip install -r app/requirements.txt
+
+      - name: Download NLTK data
+        run: |
+          .venv/bin/python -m nltk.downloader wordnet word2vec_sample brown stopwords punkt punkt_tab
+
+
+      - name: Lint with flake8
+        run: |
+          source .venv/bin/activate
+          .venv/bin/pip install flake8
+          # stop the build if there are Python syntax errors or undefined names
+          flake8 ./app --count --select=E9,F63,F7,F82 --show-source --statistics
+          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+          flake8 ./app --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+
+      - name: Run tests
+        if: always()
+        run: |
+          source .venv/bin/activate
+          pytest --junit-xml=./reports/pytest.xml --tb=auto -v
+
+      - name: Upload test results
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: test-results-${{ matrix.python-version }}
+          path: ./reports/pytest.xml
+          if-no-files-found: warn
   deploy:
-#    needs: test
+    needs: test
     uses: lambda-feedback/evaluation-function-workflows/.github/workflows/deploy.yml@main
     with:
       template-repository-name: "lambda-feedback/evaluation-function-boilerplate-python"
diff --git a/.github/workflows/test-lint.yml b/.github/workflows/test-lint.yml
index 3ad75ee..1b559a9 100644
--- a/.github/workflows/test-lint.yml
+++ b/.github/workflows/test-lint.yml
@@ -1,8 +1,7 @@
 name: Test and Lint
 
 on:
-#  pull_request:
-  workflow_dispatch:
+  pull_request:
 
 jobs:
   test:
@@ -32,6 +31,10 @@ jobs:
           .venv/bin/pip install pytest
           .venv/bin/pip install -r app/requirements.txt
 
+      - name: Download NLTK data
+        run: |
+          .venv/bin/python -m nltk.downloader wordnet word2vec_sample brown stopwords punkt punkt_tab
+
       - name: Lint with flake8
         run: |
           source .venv/bin/activate
diff --git a/README.md b/README.md
index 4054297..421d168 100755
--- a/README.md
+++ b/README.md
@@ -58,7 +58,7 @@ Once the code passes all these tests, it will then be uploaded to AWS and will b
 ## Pre-requisites
 Although all programming can be done through the GitHub interface, it is recommended you do this locally on your machine. To do this, you must have installed:
 
-- Python 3.8 or higher.
+- Python 3.12 or higher.
 
 - GitHub Desktop or the `git` CLI.
 
diff --git a/app/Dockerfile b/app/Dockerfile
index e74a84a..ddbe1a5 100755
--- a/app/Dockerfile
+++ b/app/Dockerfile
@@ -1,9 +1,13 @@
-# Base image that bundles AWS Lambda Python 3.8 image with some middleware functions
-# FROM base-eval-tmp
-FROM ghcr.io/lambda-feedback/baseevalutionfunctionlayer:main-3.8
+# Base image that bundles the AWS Lambda Python image with the lambda-feedback middleware (app.handler)
+FROM ghcr.io/lambda-feedback/baseevalutionfunctionlayer:main-3.12
+
+# The 3.12 image is Amazon Linux 2023: use dnf, and install `find` (used below)
+RUN dnf install -y findutils wget unzip && dnf clean all
 
 WORKDIR /app
 
+ENV PYTHONPATH=/app
+
 RUN mkdir /usr/share/nltk_data
 RUN mkdir -p /usr/share/nltk_data/corpora /usr/share/nltk_data/models /usr/share/nltk_data/tokenizers
 
@@ -15,9 +19,11 @@ COPY requirements.txt .
 COPY brown_length .
 COPY word_freqs .
 COPY w2v .
-RUN yum install -y wget unzip
 RUN pip3 install -r requirements.txt
 
+# The healthcheck command runs the pytest suite
+RUN pip3 install pytest
+
 # # Download NLTK data files
 # RUN wget -O /usr/share/nltk_data/corpora/wordnet.zip https://raw.githubusercontent.com/nltk/nltk_data/gh-pages/packages/corpora/wordnet.zip
 # RUN wget -O /usr/share/nltk_data/models/word2vec_sample.zip https://raw.githubusercontent.com/nltk/nltk_data/gh-pages/packages/models/word2vec_sample.zip
@@ -40,19 +46,19 @@ RUN pip3 install -r requirements.txt
 # RUN rm /usr/share/nltk_data/tokenizers/*.zip
 
 # Warnings: those commands sometimes download corrupted zips, so it is better to wget each package from the main site
-RUN python -m nltk.downloader wordnet
-RUN python -m nltk.downloader word2vec_sample
-RUN python -m nltk.downloader brown
-RUN python -m nltk.downloader stopwords
-RUN python -m nltk.downloader punkt
-RUN python -m nltk.downloader punkt_tab
+RUN python3 -m nltk.downloader wordnet
+RUN python3 -m nltk.downloader word2vec_sample
+RUN python3 -m nltk.downloader brown
+RUN python3 -m nltk.downloader stopwords
+RUN python3 -m nltk.downloader punkt
+RUN python3 -m nltk.downloader punkt_tab
 
 # Copy the evaluation and testing scripts
 COPY brown_length ./app/
 COPY word_freqs ./app/
 COPY w2v ./app/
 COPY evaluation.py ./app/
-COPY evaluation_test.py ./app/
+COPY evaluation_tests.py ./app/
 
 # Copy Documentation
 COPY docs/dev.md ./app/docs/dev.md
@@ -62,5 +68,6 @@ COPY docs/user.md ./app/docs/user.md
 RUN chmod 644 $(find . -type f)
 RUN chmod 755 $(find . -type d)
 
-# The entrypoint for AWS is to invoke the handler function within the app package
-CMD [ "/app/app.handler" ]
+# The entrypoint for AWS is to invoke the handler function within the app package.
+# Python 3.12's Lambda runtime imports this as a module name, so it can't be a path.
+CMD [ "app.handler" ]
diff --git a/app/evaluation_test.py b/app/evaluation_tests.py
similarity index 100%
rename from app/evaluation_test.py
rename to app/evaluation_tests.py
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..589497f
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,4 @@
+[pytest]
+# evaluation_tests.py is the name the base layer's healthcheck imports, so
+# include it alongside pytest's default patterns.
+python_files = test_*.py *_test.py *_tests.py