diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
new file mode 100644
index 0000000..bdec4c5
--- /dev/null
+++ b/.github/workflows/pytest.yml
@@ -0,0 +1,24 @@
+name: Test with pytest
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@main
+
+      - name: Set up Python 3
+        uses: actions/setup-python@main
+        with:
+          python-version: "3.x"
+
+      - name: Install Poetry
+        run: curl https://install.python-poetry.org | python -
+
+      - name: Install dependencies
+        run: poetry install
+
+      - name: Run pytest
+        run: poetry run python -m pytest
diff --git a/wulkabot/cogs/automod.py b/wulkabot/cogs/automod.py
index d4fee49..8e66b59 100644
--- a/wulkabot/cogs/automod.py
+++ b/wulkabot/cogs/automod.py
@@ -18,7 +18,7 @@ def is_ios_request(text: str, /) -> bool:
         # the text is longer and doesn't look like just a simple question
         return False
 
-    words = set(remove_diacritics(text.replace("?", "").replace("!", "")).lower().split())
+    words = set(remove_diacritics(text.replace("?", "").replace("!", "")).casefold().split())
 
     if "ios" not in words:
         return False
diff --git a/wulkabot/cogs/faq.py b/wulkabot/cogs/faq.py
index 69868f9..15f4b11 100644
--- a/wulkabot/cogs/faq.py
+++ b/wulkabot/cogs/faq.py
@@ -29,7 +29,7 @@ class FAQ(commands.Cog):
         return [
             app_commands.Choice(name=question, value=question)
             for question in self.questions
-            if current.lower() in question.lower()
+            if current.casefold() in question.casefold()
         ]
 
     @app_commands.command()
diff --git a/wulkabot/cogs/github.py b/wulkabot/cogs/github.py
index 85c26c0..6c7422b 100644
--- a/wulkabot/cogs/github.py
+++ b/wulkabot/cogs/github.py
@@ -155,7 +155,8 @@ class GitHub(commands.Cog):
         if message.author.bot:
             return
 
-        words = message.content.split()
+        # `dict.fromkeys` allows us to deduplicate the list whilst preserving order
+        words = dict.fromkeys(message.content.casefold().split()).keys()
         embeds = []
 
         try:
@@ -193,6 +194,7 @@ class GitHub(commands.Cog):
             view = DeleteButton(message.author)
             reply = await message.reply(embeds=embeds[:3], view=view)
             view.message = reply
+            print(reply.embeds)
 
 
 async def setup(bot: bot.Wulkabot):
diff --git a/wulkabot/utils/views.py b/wulkabot/utils/views.py
index ca76b88..a20fc55 100644
--- a/wulkabot/utils/views.py
+++ b/wulkabot/utils/views.py
@@ -8,11 +8,17 @@ class DeleteButton(discord.ui.View):
         self.message: discord.Message | None = None
 
     async def interaction_check(self, interaction: discord.Interaction) -> bool:
-        return (
+        if (
             interaction.user == self.invoker
             or isinstance(interaction.user, discord.Member)
             and interaction.user.resolved_permissions.manage_messages
+        ):
+            return True
+
+        await interaction.response.send_message(
+            "Tylko osoba która wywołała bota może usunąć tę wiadomość", ephemeral=True
         )
+        return False
 
     @discord.ui.button(label="Usuń", style=discord.ButtonStyle.danger)
     async def confirm(self, interaction: discord.Interaction, button: discord.ui.Button) -> None: