diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4a98d1f74..23f9bbe86 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -50,13 +50,11 @@ jobs:
           python-version: ${{ matrix.config.python-version }}
           cache: "pip"
           cache-dependency-path: "pyproject.toml"
-      - name: Install oldest version of PyMC
-        if: ${{ matrix.config.oldest-pymc }}
-        run: pip install pymc==${{ env.OLDEST_PYMC_VERSION }}
       - name: Run tests
         run: |
           sudo apt-get install graphviz graphviz-dev
-          pip install -e .[test]
+          pip install -e .
+          pip install -e .[test] --force-reinstall
           pytest ${{ matrix.split }}
       - name: Check oldest version of PyMC
         if: ${{ matrix.config.oldest-pymc }}
@@ -88,7 +86,8 @@ jobs:
       - name: Run tests
         run: |
           sudo apt-get install graphviz graphviz-dev
-          pip install -e .[test]
+          pip install -e .
+          pip install -e .[test] --force-reinstall
           pytest --only-slow ${{ matrix.split }}
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v5
diff --git a/.github/workflows/test_notebook.yml b/.github/workflows/test_notebook.yml
index a6359917a..25b55a7d7 100644
--- a/.github/workflows/test_notebook.yml
+++ b/.github/workflows/test_notebook.yml
@@ -34,6 +34,7 @@ jobs:
     - name: Install dependencies
       run: |
         sudo apt-get install graphviz graphviz-dev
-        pip install -e .[docs,test,dag]
+        pip install -e .
+        pip install -e .[docs,test,dag] --force-reinstall
     - name: Run notebooks
       run: make run_notebooks
diff --git a/pyproject.toml b/pyproject.toml
index 413e09aa5..2e917f78e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,9 +30,7 @@ dependencies = [
     "numpy>=1.17",
     "pandas",
     "pydantic>=2.1.0",
-    # NOTE: Used as minimum pymc version with test.yml `OLDEST_PYMC_VERSION`
-    "pymc>=5.22.0,<5.23.0",
-    "pytensor>=2.30.3",
+    "pytensor @ git+https://github.com/zaxtax/pytensor.git@blockwise_scan_hack",
     "scikit-learn>=1.1.1",
     "seaborn>=0.12.2",
     "xarray>=2024.1.0",
@@ -73,6 +71,7 @@ docs = [
 ]
 lint = ["mypy", "pandas-stubs", "pre-commit>=2.19.0", "ruff>=0.1.4"]
 test = [
+    "pymc>=5.22.0",
     "blackjax",
     "nutpie",
     "numpyro",
@@ -97,6 +96,9 @@ exclude = ["docs"]
 path = "pymc_marketing/version.py"
 
 # <https://github.com/hynek/hatch-fancy-pypi-readme>
+[tool.hatch.metadata]
+allow-direct-references = true
+
 [tool.hatch.metadata.hooks.fancy-pypi-readme]
 content-type = "text/markdown"