diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index f9431db..c7d4bbd 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -16,17 +16,39 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        python -m pip install tox tox-gh-actions
-    - name: Test with tox
-      run: tox
+      - uses: actions/checkout@v2
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install tox tox-gh-actions
+
+      # Install TeX distribution for PGF output from matplotlib
+      - name: Install TeX distribution for PGF output (Ubuntu)
+        if: runner.os == 'Linux'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y texlive-latex-extra texlive-xetex
+
+      - name: Install TeX distribution for PGF output (Windows)
+        if: runner.os == 'Windows'
+        run: |
+          choco install miktex -y
+          echo "C:\Program Files\MiKTeX\miktex\bin\x64" >> $env:GITHUB_PATH
+
+      - name: Install TeX distribution for PGF output (macOS)
+        if: runner.os == 'macOS'
+        run: |
+          brew install --cask mactex-no-gui
+          echo "/Library/TeX/texbin" >> $GITHUB_PATH
+
+      - name: Test with tox
+        run: tox
 
   deploy:
     needs: build
diff --git a/README.rst b/README.rst
index b51aaf8..c0a9cd5 100644
--- a/README.rst
+++ b/README.rst
@@ -270,7 +270,7 @@ Executes a plotting function and saves the resulting plot to specified formats u
 +----------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
 | ``teeplot_postprocess``    | Actions to perform after plotting but before saving. Can be a string of code to ``exec`` or a callable function. If a string, it's executed with access to ``plt`` and ``sns`` (if installed), and the plotter return value as ``teed``. |
 +----------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
-| ``teeplot_save``           | File formats to save the plots in. Defaults to global settings if ``True``, all output suppressed if ``False``. Default global setting is ``{" .png", ".pdf"}``. Supported: ".eps", ".png", ".pdf", ".ps", ".svg".                       |
+| ``teeplot_save``           | File formats to save the plots in. Defaults to global settings if ``True``, all output suppressed if ``False``. Default global setting is ``{" .png", ".pdf"}``. Supported: ".eps", ".png", ".pdf", ".pgf", ".ps", ".svg".                       |
 +----------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
 | ``teeplot_show``           | Dictates whether ``plt.show()`` should be called after plot is saved. If True, the plot is displayed using ``plt.show()``. Default behavior is to display if an interactive environment is detected (e.g., a notebook).                  |
 +----------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
@@ -296,7 +296,7 @@ Environment Variables
 
 -  ``TEEPLOT_ONCOLLISION``: Configures the default collision handling strategy. See ``teeplot_oncollision`` kwarg
 -  ``TEEPLOT_DRAFTMODE``: If set, enables draft mode globally.
--  ``TEEPLOT_<FORMAT>``: Boolean flags that determine default behavior for each format (e.g., ``EPS``, ``PNG``, ``PDF``, ``PS``, ``SVG``); "defer" defers to call kwargs.
+-  ``TEEPLOT_<FORMAT>``: Boolean flags that determine default behavior for each format (e.g., ``EPS``, ``PNG``, ``PDF``, ``PGF``, ``PS``, ``SVG``); "defer" defers to call kwargs.
 
 Citing
 ------
diff --git a/teeplot/teeplot.py b/teeplot/teeplot.py
index 82e30f2..2409148 100644
--- a/teeplot/teeplot.py
+++ b/teeplot/teeplot.py
@@ -36,6 +36,7 @@ def _is_running_on_ci() -> bool:
 save = {
     ".eps": None,
     ".pdf": True,
+    ".pgf": None,
     ".png": True,
     ".ps": None,
     ".svg": None,
@@ -338,14 +339,16 @@ def save_callback():
                 transparent=teeplot_transparent,
                 dpi=teeplot_dpi,
                 # see https://matplotlib.org/2.1.1/users/whats_new.html#reproducible-ps-pdf-and-svg-output
-                metadata={
-                    key: None
-                    for key in {
-                        ".png": [],
-                        ".pdf": ["CreationDate"],
-                        ".svg": ["Date"],
-                    }.get(ext, [])
-                },
+                **dict(
+                    metadata={
+                        key: None
+                        for key in {
+                            ".png": [],
+                            ".pdf": ["CreationDate"],
+                            ".svg": ["Date"],
+                        }.get(ext, [])
+                    },
+                ) if ext != ".pgf" else {},
             )
 
         if teeplot_show or (teeplot_show is None and hasattr(sys, 'ps1')):
diff --git a/tests/test_tee.py b/tests/test_tee.py
index b318e63..1f42527 100644
--- a/tests/test_tee.py
+++ b/tests/test_tee.py
@@ -209,7 +209,7 @@ def test_oncollision_fix():
         )
 
 
-@pytest.mark.parametrize("format", [".png", ".pdf", ".ps", ".eps", ".svg"])
+@pytest.mark.parametrize("format", [".png", ".pdf", ".pgf", ".ps", ".eps", ".svg"])
 def test_outformat(format):
 
     # adapted from https://seaborn.pydata.org/generated/seaborn.lineplot.html