diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index aec13497e..5bbb76848 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -95,18 +95,14 @@ jobs:
         uses: snok/install-poetry@v1
         with:
           virtualenvs-create: false
-      - name: Install Dependencies
-        run: |
-          if [[ ${{ runner.os == 'macOS' }} ]]; then
-            source ./hack/activate-libomp-macos.sh
-          fi
-          poetry install --sync --only dev
+      - name: Install dependencies
+        run: poetry install --only test
       - name: Test
         run: |
           if [[ ${{ runner.os == 'macOS' }} ]]; then
             source ./hack/activate-libomp-macos.sh
           fi
-          tox -e mlserver
+          poetry run tox -e mlserver
 
   runtimes:
     strategy:
@@ -152,18 +148,14 @@ jobs:
         uses: snok/install-poetry@v1
         with:
           virtualenvs-create: false
-      - name: Install Dependencies
-        run: |
-          if [[ ${{ runner.os == 'macOS' }} ]]; then
-            source ./hack/activate-libomp-macos.sh
-          fi
-          poetry install --sync --only dev
+      - name: Install dependencies
+        run: poetry install --only test
       - name: Test
         run: |
           if [[ ${{ runner.os == 'macOS' }} ]]; then
             source ./hack/activate-libomp-macos.sh
           fi
-          tox -c ./runtimes/${{ matrix.tox-environment }}
+          poetry run tox -c ./runtimes/${{ matrix.tox-environment }}
 
   # Ensure that having all the runtimes installed together works
   all-runtimes:
@@ -209,15 +201,11 @@ jobs:
         uses: snok/install-poetry@v1
         with:
           virtualenvs-create: false
-      - name: Install Dependencies
-        run: |
-          if [[ ${{ runner.os == 'macOS' }} ]]; then
-            source ./hack/activate-libomp-macos.sh
-          fi
-          poetry install --sync --only dev
+      - name: Install dependencies
+        run: poetry install --only test
       - name: Test
         run: |
           if [[ ${{ runner.os == 'macOS' }} ]]; then
             source ./hack/activate-libomp-macos.sh
           fi
-          tox -e all-runtimes
+          poetry run tox -e all-runtimes
diff --git a/poetry.lock b/poetry.lock
index 79098183e..223f436cc 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.8.1 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.8.3 and should not be changed by hand.
 
 [[package]]
 name = "absl-py"
@@ -2655,13 +2655,13 @@ files = [
 
 [[package]]
 name = "jinja2"
-version = "3.1.3"
+version = "3.1.4"
 description = "A very fast and expressive template engine."
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "Jinja2-3.1.3-py3-none-any.whl", hash = "sha256:7d6d50dd97d52cbc355597bd845fabfbac3f551e1f99619e39a35ce8c370b5fa"},
-    {file = "Jinja2-3.1.3.tar.gz", hash = "sha256:ac8bd6544d4bb2c9792bf3a159e80bba8fda7f07e81bc3aed565432d5925ba90"},
+    {file = "jinja2-3.1.4-py3-none-any.whl", hash = "sha256:bc5dd2abb727a5319567b7a813e6a2e7318c39f4f487cfe6c89c6f9c7d25197d"},
+    {file = "jinja2-3.1.4.tar.gz", hash = "sha256:4a3aee7acbbe7303aede8e9648d13b8bf88a429282aa6122a993f0ac800cb369"},
 ]
 
 [package.dependencies]
@@ -7404,13 +7404,13 @@ testing = ["build[virtualenv] (>=1.0.3)", "covdefaults (>=2.3)", "detect-test-po
 
 [[package]]
 name = "tqdm"
-version = "4.66.2"
+version = "4.66.3"
 description = "Fast, Extensible Progress Meter"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "tqdm-4.66.2-py3-none-any.whl", hash = "sha256:1ee4f8a893eb9bef51c6e35730cebf234d5d0b6bd112b0271e10ed7c24a02bd9"},
-    {file = "tqdm-4.66.2.tar.gz", hash = "sha256:6cd52cdf0fef0e0f543299cfc96fec90d7b8a7e88745f411ec33eb44d5ed3531"},
+    {file = "tqdm-4.66.3-py3-none-any.whl", hash = "sha256:4f41d54107ff9a223dca80b53efe4fb654c67efaba7f47bada3ee9d50e05bd53"},
+    {file = "tqdm-4.66.3.tar.gz", hash = "sha256:23097a41eba115ba99ecae40d06444c15d1c0c698d527a01c6c8bd1c5d0647e5"},
 ]
 
 [package.dependencies]
@@ -8422,4 +8422,4 @@ testing = ["coverage (>=5.0.3)", "zope.event", "zope.testing"]
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.9,<3.12"
-content-hash = "76bae1ad422aba591bf2ed9b9fdf04f5d38ef1f7d494908f6276fbb92c712c52"
+content-hash = "a0089ebf9891465b56ad5451a053712de395f94f34aa4e900eead50923c9c4ab"
diff --git a/pyproject.toml b/pyproject.toml
index 32d11c0e4..08a0d80db 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -76,6 +76,9 @@ opentelemetry-instrumentation-grpc = ">=0.43b0"
 opentelemetry-exporter-otlp-proto-grpc = "^1.22.0"
 pytest-lazy-fixture = "^0.6.3"
 
+[tool.poetry.group.test.dependencies]
+tox = "4.14.2"
+
 [tool.poetry.group.dev.dependencies]
 datamodel-code-generator = "0.25.5"
 grpcio-tools = "1.48.2"