diff --git a/tests/__snapshots__/test_src_trace/test_build_html[sphinx_project4-source_code4].doctree.xml b/tests/__snapshots__/test_src_trace/test_build_html[sphinx_project4-source_code4].doctree.xml
new file mode 100644
index 00000000..c3361fad
--- /dev/null
+++ b/tests/__snapshots__/test_src_trace/test_build_html[sphinx_project4-source_code4].doctree.xml
@@ -0,0 +1,3 @@
+<document source="<source>">
+    <target anonymous="" ids="IMPL_1" refid="IMPL_1">
+    <Need classes="need need-impl" ids="IMPL_1" refid="IMPL_1">
diff --git a/tests/doc_test/cs_basic/conf.py b/tests/doc_test/cs_basic/conf.py
new file mode 100644
index 00000000..d67a5bb1
--- /dev/null
+++ b/tests/doc_test/cs_basic/conf.py
@@ -0,0 +1,27 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# For the full list of built-in configuration values, see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Project information -----------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
+
+project = "source-tracing-demo"
+copyright = "2025, useblocks"
+author = "useblocks"
+
+# -- General configuration ---------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
+
+extensions = ["sphinx_needs", "sphinx_codelinks"]
+
+templates_path = ["_templates"]
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
+
+src_trace_config_from_toml = "src_trace.toml"
+
+# -- Options for HTML output -------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
+
+html_theme = "alabaster"
+html_static_path = ["_static"]
diff --git a/tests/doc_test/cs_basic/dummy_src.cs b/tests/doc_test/cs_basic/dummy_src.cs
new file mode 100644
index 00000000..4e3d3a38
--- /dev/null
+++ b/tests/doc_test/cs_basic/dummy_src.cs
@@ -0,0 +1,7 @@
+using System;
+
+// @ title here, IMPL_1, impl
+void SingleLineExample()
+{
+    Console.WriteLine("Single-line comment example");
+}
diff --git a/tests/doc_test/cs_basic/index.rst b/tests/doc_test/cs_basic/index.rst
new file mode 100644
index 00000000..1750ff79
--- /dev/null
+++ b/tests/doc_test/cs_basic/index.rst
@@ -0,0 +1,2 @@
+.. src-trace::
+   :project: src
diff --git a/tests/doc_test/cs_basic/src_trace.toml b/tests/doc_test/cs_basic/src_trace.toml
new file mode 100644
index 00000000..fd2a0913
--- /dev/null
+++ b/tests/doc_test/cs_basic/src_trace.toml
@@ -0,0 +1,5 @@
+[codelinks.projects.src]
+remote_url_pattern = "https://github.com/useblocks/sphinx-codelinks/blob/{commit}/{path}#L{line}"
+
+[codelinks.projects.src.source_discover]
+comment_type = "cs"
diff --git a/tests/test_src_trace.py b/tests/test_src_trace.py
index 8e87a71e..94c509fc 100644
--- a/tests/test_src_trace.py
+++ b/tests/test_src_trace.py
@@ -192,6 +192,10 @@ def test_src_tracing_config_positive(make_app: Callable[..., SphinxTestApp], tmp
             Path("doc_test") / "id_required",
             Path("doc_test") / "id_required",
         ),
+        (
+            Path("doc_test") / "cs_basic",
+            Path("doc_test") / "cs_basic",
+        ),
     ],
 )
 def test_build_html(