diff --git a/crates/red_knot_test/Cargo.toml b/crates/red_knot_test/Cargo.toml
index bdc9e4738cf235..4f974b5a525494 100644
--- a/crates/red_knot_test/Cargo.toml
+++ b/crates/red_knot_test/Cargo.toml
@@ -13,7 +13,7 @@ license.workspace = true
 [dependencies]
 red_knot_python_semantic = { workspace = true, features = ["serde"] }
 red_knot_vendored = { workspace = true }
-ruff_db = { workspace = true }
+ruff_db = { workspace = true, features = ["testing"] }
 ruff_index = { workspace = true }
 ruff_python_trivia = { workspace = true }
 ruff_source_file = { workspace = true }
diff --git a/crates/red_knot_test/README.md b/crates/red_knot_test/README.md
index e4e7010d916ae0..9608adab1b1e9a 100644
--- a/crates/red_knot_test/README.md
+++ b/crates/red_knot_test/README.md
@@ -241,6 +241,8 @@ python-version = "3.10"
 This configuration will apply to all tests in the same section, and all nested sections within that
 section. Nested sections can override configurations from their parent sections.
 
+See [`MarkdownTestConfig`](https://github.com/astral-sh/ruff/blob/main/crates/red_knot_test/src/config.rs) for the full list of supported configuration options.
+
 ## Documentation of tests
 
 Arbitrary Markdown syntax (including of course normal prose paragraphs) is permitted (and ignored by
diff --git a/crates/red_knot_test/src/config.rs b/crates/red_knot_test/src/config.rs
index b73cdfacaef2f6..cf677c485c3da4 100644
--- a/crates/red_knot_test/src/config.rs
+++ b/crates/red_knot_test/src/config.rs
@@ -16,6 +16,7 @@ use serde::Deserialize;
 #[serde(rename_all = "kebab-case", deny_unknown_fields)]
 pub(crate) struct MarkdownTestConfig {
     pub(crate) environment: Option<Environment>,
+
     pub(crate) log: Option<Log>,
 }
 
@@ -32,12 +33,15 @@ impl MarkdownTestConfig {
 #[derive(Deserialize, Debug, Default, Clone)]
 #[serde(rename_all = "kebab-case", deny_unknown_fields)]
 pub(crate) struct Environment {
+    /// Python version to assume when resolving types.
     pub(crate) python_version: Option<PythonVersion>,
 }
 
 #[derive(Deserialize, Debug, Clone)]
 #[serde(untagged)]
 pub(crate) enum Log {
+    /// Enable logging with tracing when `true`.
     Bool(bool),
+    /// Enable logging and only show filters that match the given [env-filter](https://docs.rs/tracing-subscriber/latest/tracing_subscriber/filter/struct.EnvFilter.html)
     Filter(String),
 }