2 files changed, 8 insertions, 1 deletions
diff --git a/Cargo.toml b/Cargo.toml
index 3bfe654..7500897 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,3 +7,4 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+serde_yaml = "0.8.9"
diff --git a/src/lib.rs b/src/lib.rs
index c73dde5..6886727 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -89,7 +89,7 @@ impl Roadmap {
     }
 
     /// Create a new roadmap from a YAML representation.
-    pub fn from_yaml(_yaml: String) -> Result<Roadmap, Box<dyn std::error::Error>> {
+    pub fn from_yaml(_yaml: &str) -> Result<Roadmap, Box<dyn std::error::Error>> {
         Ok(Roadmap::new())
     }
 
@@ -225,4 +225,10 @@ first -> second;
 }
 ");
     }
+
+    #[test]
+    fn from_empty_yaml() {
+        let roadmap = Roadmap::from_yaml("{}").unwrap();
+        assert_eq!(roadmap.step_names().len(), 0);
+    }
 }