diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index 83a63d85..f6dee466 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -32,4 +32,50 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
       - name: Run Tests
-        run: docker-compose run conceptql
\ No newline at end of file
+        run: docker-compose run conceptql
+  Run-Spark-Tests:
+    strategy:
+      matrix:
+        include:
+          - vocab: gdm
+          - vocab: ohdsi
+    runs-on: ubuntu-22.04
+    env:
+      SPARK_VERSION: 3.5.0
+      CONCEPTQL_DATA_MODEL: gdm
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.2
+          bundler-cache: true
+
+      - uses: actions/cache@v3
+        with:
+          path: ~/spark
+          key: spark-${{ env.SPARK_VERSION }}
+        id: cache-spark
+      - name: Download Spark
+        if: steps.cache-spark.outputs.cache-hit != 'true'
+        run: |
+          wget -q https://archive.apache.org/dist/spark/spark-$SPARK_VERSION/spark-$SPARK_VERSION-bin-hadoop3.tgz
+          tar xzf spark-$SPARK_VERSION-bin-hadoop3.tgz
+          mv spark-$SPARK_VERSION-bin-hadoop3 ~/spark
+
+      - uses: actions/cache@v3
+        with:
+          path: /tmp/synpuf_test_data
+          key: synpuf-test-data
+        id: cache-synpuf-test-data
+      - name: Download Data
+        if: steps.cache-synpuf-test-data.outputs.cache-hit != 'true'
+        run: |
+          cd /tmp
+          curl -sSL "https://www.dropbox.com/scl/fi/hha5zjm9d5ezkk8bfvtnc/synpuf_test_data.tgz?rlkey=lythw2s6342609ave66cam2ms&dl=1" > synpuf_test_data.tgz 
+          tar xzf synpuf_test_data.tgz
+
+      - run: ~/spark/sbin/start-thriftserver.sh --driver-memory 5G && sleep 20
+      - run: bundle exec ruby test/all.rb
+        env:
+          CONCEPTQL_PARQUET_TEST_DIR: /tmp/synpuf_test_data/${{ matrix.vocab }}
+          SEQUELIZER_URL: hexspace://localhost:10000/default
\ No newline at end of file
diff --git a/Gemfile b/Gemfile
index f1b19781..b01040e7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 # Specify your gem's dependencies in conceptql.gemspec
 gemspec
 gem "pg"
-gem "sequel-hexspace", path: "../sequel-hexspace"
+gem "sequel-hexspace", github: "outcomesinsights/sequel-hexspace"
 
 group :test, :development do
   gem "nokogiri"
diff --git a/Gemfile.lock b/Gemfile.lock
index a28a8b25..ec9cfd1f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,5 +1,6 @@
-PATH
-  remote: ../sequel-hexspace
+GIT
+  remote: https://github.com/outcomesinsights/sequel-hexspace.git
+  revision: a6cddba0a45283581a8bf3e1a4580a146ea4eb1c
   specs:
     sequel-hexspace (1.0.0)
       hexspace
diff --git a/dockers/standard/Dockerfile b/dockers/standard/Dockerfile
index 7d2ebc04..9e5058ea 100644
--- a/dockers/standard/Dockerfile
+++ b/dockers/standard/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.7-slim
+FROM ruby:3.2-slim-bullseye
 
 ENV PATH="/root/.local/bin:${PATH}"
 
diff --git a/lib/conceptql/spark_prepper.rb b/lib/conceptql/spark_prepper.rb
index aa90fce1..66b51bbf 100644
--- a/lib/conceptql/spark_prepper.rb
+++ b/lib/conceptql/spark_prepper.rb
@@ -20,5 +20,9 @@ def prep
         db.create_view(table_name, temp: true, if_not_exists: true, using: 'org.apache.spark.sql.parquet', options: { path: parquet_file.expand_path })
       end
     end
+    if ENV["CI"].present?
+      # Broadcast joins are running out of memory in GitHub Actions
+      #db.run("SET spark.sql.autoBroadcastJoinThreshold=6134169")
+    end
   end
 end
\ No newline at end of file