diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 0bdff89d..5b4c58c5 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -31,7 +31,7 @@ jobs:
           # - hw_4.ipynb # has incomplete code
           - hw_5.ipynb
           - lecture_0.ipynb
-          # - lecture_1.ipynb # uses sample()
+          - lecture_1.ipynb
           - lecture_2.ipynb
           - lecture_3.ipynb
           - lecture_4.ipynb
diff --git a/scripts/diffable.py b/scripts/diffable.py
index 93b4395f..7d13148f 100644
--- a/scripts/diffable.py
+++ b/scripts/diffable.py
@@ -38,6 +38,10 @@ def has_html_output(output):
     if cell["source"][0].startswith("!"):
         cell["outputs"] = []
 
+    # ignore sample() output
+    if any(".sample(" in line for line in cell["source"]):
+        cell["outputs"] = []
+
     # filter out pip upgrade warnings
     cell["outputs"] = [line for line in cell["outputs"] if not is_pip_upgrade_msg(line)]