diff --git a/Cargo.toml b/Cargo.toml
index 9493693..bc4add1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,3 +20,7 @@ axum-test = "16.4.0"
 [features]
 default = []
 task1-9 = ["cargo-manifest", "serde_yml", "toml"]
+task12 = []
+task16 = []
+task19 = []
+task23 = []
diff --git a/tests/task_nineteen/main.rs b/tests/task_nineteen/main.rs
new file mode 100644
index 0000000..db1fb5f
--- /dev/null
+++ b/tests/task_nineteen/main.rs
@@ -0,0 +1,9 @@
+#[cfg(feature = "task19")]
+mod task_nineteen {
+    use axum_test::TestServer;
+    use itsscb_shuttlings_cch24::router;
+
+    fn test_server() -> TestServer {
+        TestServer::new(router()).unwrap()
+    }
+}
diff --git a/tests/task_sixteen/main.rs b/tests/task_sixteen/main.rs
new file mode 100644
index 0000000..13589b1
--- /dev/null
+++ b/tests/task_sixteen/main.rs
@@ -0,0 +1,9 @@
+#[cfg(feature = "task16")]
+mod task_sixteen {
+    use axum_test::TestServer;
+    use itsscb_shuttlings_cch24::router;
+
+    fn test_server() -> TestServer {
+        TestServer::new(router()).unwrap()
+    }
+}
diff --git a/tests/task_twelve/main.rs b/tests/task_twelve/main.rs
new file mode 100644
index 0000000..0f61fde
--- /dev/null
+++ b/tests/task_twelve/main.rs
@@ -0,0 +1,9 @@
+#[cfg(feature = "task12")]
+mod task_twelve {
+    use axum_test::TestServer;
+    use itsscb_shuttlings_cch24::router;
+
+    fn test_server() -> TestServer {
+        TestServer::new(router()).unwrap()
+    }
+}
diff --git a/tests/task_twentythree/main.rs b/tests/task_twentythree/main.rs
new file mode 100644
index 0000000..fe9d4ef
--- /dev/null
+++ b/tests/task_twentythree/main.rs
@@ -0,0 +1,9 @@
+#[cfg(feature = "task23")]
+mod task_twentythree {
+    use axum_test::TestServer;
+    use itsscb_shuttlings_cch24::router;
+
+    fn test_server() -> TestServer {
+        TestServer::new(router()).unwrap()
+    }
+}