diff --git a/README.md b/README.md
index 4969f33..c0e83ac 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 [cov-link]: https://codecov.io/gh/executablebooks/mdformat-gfm-alerts
  -->
 
-An [mdformat](https://github.com/executablebooks/mdformat) plugin for [GitHub "Alerts"](https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#alerts) (and [community discussion](https://github.com/orgs/community/discussions/16925)).
+An [mdformat](https://github.com/executablebooks/mdformat) plugin for [GitHub "Alerts"](https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#alerts). "Alerts" are a block quote variation of admonitions that were proposed in this [community discussion](https://github.com/orgs/community/discussions/16925) and are currently a separate extension of the [GFM (GitHub-Flavored Markdown) syntax](https://github.github.com/gfm).
 
 ## `mdformat` Usage
 
diff --git a/tests/fixtures.md b/tests/fixtures.md
deleted file mode 100644
index 31d6be2..0000000
--- a/tests/fixtures.md
+++ /dev/null
@@ -1,24 +0,0 @@
-a test
-.
-This is the input Markdown test,
-then below add the expected output.
-.
-This is the input Markdown test,
-then below add the expected output.
-.
-
-another test
-.
-Some *markdown*
-
-- a
-- b
-* c
-.
-Some *markdown*
-
-- a
-- b
-
-* c
-.
diff --git a/tests/format/__init__.py b/tests/format/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/format/fixtures.md b/tests/format/fixtures.md
new file mode 100644
index 0000000..9cc71d2
--- /dev/null
+++ b/tests/format/fixtures.md
@@ -0,0 +1,47 @@
+2023 Syntax
+.
+> [!NOTE]
+> Useful information that users should know, even when skimming content.
+
+> [!TIP]
+> Helpful advice for doing things better or more easily.
+
+> [!IMPORTANT]
+> Key information users need to know to achieve their goal.
+
+> [!WARNING]
+> Urgent info that needs immediate user attention to avoid problems.
+
+> [!CAUTION]
+> Advises about risks or negative outcomes of certain actions.
+.
+> [!NOTE]
+> Useful information that users should know, even when skimming content.
+
+> [!TIP]
+> Helpful advice for doing things better or more easily.
+
+> [!IMPORTANT]
+> Key information users need to know to achieve their goal.
+
+> [!WARNING]
+> Urgent info that needs immediate user attention to avoid problems.
+
+> [!CAUTION]
+> Advises about risks or negative outcomes of certain actions.
+.
+
+2022 (to 2023) Syntax
+.
+> **Note**
+> This is a note
+
+> **Warning**
+> This is a warning
+.
+> [!NOTE]
+> This is a note
+
+> [!WARNING]
+> This is a warning
+.
diff --git a/tests/test_fixtures.py b/tests/format/test_fixtures.py
similarity index 51%
rename from tests/test_fixtures.py
rename to tests/format/test_fixtures.py
index 68fc3bf..cd35b91 100644
--- a/tests/test_fixtures.py
+++ b/tests/format/test_fixtures.py
@@ -1,17 +1,21 @@
 from pathlib import Path
 
-from markdown_it.utils import read_fixture_file
 import mdformat
 import pytest
+from markdown_it.utils import read_fixture_file
+
+from ..helpers import print_text
 
 FIXTURE_PATH = Path(__file__).parent / "fixtures.md"
 fixtures = read_fixture_file(FIXTURE_PATH)
 
 
 @pytest.mark.parametrize(
-    "line,title,text,expected", fixtures, ids=[f[1] for f in fixtures]
+    ("line", "title", "text", "expected"),
+    fixtures,
+    ids=[f[1] for f in fixtures],
 )
 def test_fixtures(line, title, text, expected):
-    output = mdformat.text(text, extensions={"plugin"})
-    print(output)
-    assert output.rstrip() == expected.rstrip(), output
+    output = mdformat.text(text, extensions={"gfm_alerts"})
+    print_text(output, expected)
+    assert output.rstrip() == expected.rstrip()
diff --git a/tests/render/__init__.py b/tests/render/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_mdformat.py b/tests/test_mdformat.py
new file mode 100644
index 0000000..13aae32
--- /dev/null
+++ b/tests/test_mdformat.py
@@ -0,0 +1,18 @@
+from pathlib import Path
+
+import mdformat
+
+
+def test_mdformat_text():
+    """Verify that using mdformat works as expected."""
+    content = (Path(__file__).parent / "pre-commit-test.md").read_text()
+
+    result = mdformat.text(
+        content,
+        options={"end-of-line": "keep"},
+        extensions={
+            "gfm_alerts",
+        },
+    )
+
+    assert result == content