diff --git a/flow/test/test_helper.sh b/flow/test/test_helper.sh
index 36e1c78257..96379309eb 100755
--- a/flow/test/test_helper.sh
+++ b/flow/test/test_helper.sh
@@ -111,9 +111,15 @@ if [ $RUN_AUTOTUNER -eq 1 ]; then
   echo "Running Autotuner smoke sweep test"
   python3 -m unittest tools.AutoTuner.test.smoke_test_sweep.${PLATFORM}SweepSmokeTest.test_sweep
 
-  echo "Running Autotuner ref file test (only once)"
   if [ "$PLATFORM" == "asap7" ] && [ "$DESIGN" == "gcd" ]; then
+    echo "Running the following tests once."
+
+    echo "Running Autotuner ref file test"
     python3 -m unittest tools.AutoTuner.test.ref_file_check.RefFileCheck.test_files
+
+    echo "Running Autotuner plotting utility test"
+    folder_name=$(ls -dt ./flow/logs/asap7/gcd/test-tune* | head -n 1)
+    python3 tools/AutoTuner/src/autotuner/utils/plot.py --results_dir=$folder_name
   fi
 
   echo "Running Autotuner smoke algorithm & evaluation test"
diff --git a/tools/AutoTuner/src/autotuner/utils/plot.py b/tools/AutoTuner/src/autotuner/utils/plot.py
index bf45b7cdeb..3ba4dc5aa3 100644
--- a/tools/AutoTuner/src/autotuner/utils/plot.py
+++ b/tools/AutoTuner/src/autotuner/utils/plot.py
@@ -4,9 +4,11 @@
 import pandas as pd
 import matplotlib.pyplot as plt
 import re
+import os
 import argparse
 
 AT_REGEX = r"variant-AutoTunerBase-([\w-]+)-\w+"
+IMG_DIR = "images"
 
 
 def load_dir(dir: str) -> pd.DataFrame:
@@ -83,6 +85,8 @@ def plot(df: pd.DataFrame, key: str):
 
 
 def main(results_dir: str):
+    # Default: saves to <REPO_ROOT>/images. Change the IMG_DIR above.
+    os.makedirs(IMG_DIR, exist_ok=True)
     df = load_dir(results_dir)
     df = preprocess(df)
     keys = ["qor", "runtime", "clk_period", "worst_slack"]
@@ -93,7 +97,10 @@ def main(results_dir: str):
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(description="Plot AutoTuner results.")
     parser.add_argument(
-        "results_dir", type=str, help="Directory containing the results.", required=True
+        "--results_dir",
+        type=str,
+        help="Directory containing the results.",
+        required=True,
     )
     args = parser.parse_args()
     main(args.results_dir)