diff --git a/src/core/slide.rs b/src/core/slide.rs
index 91cb573..048bcb3 100644
--- a/src/core/slide.rs
+++ b/src/core/slide.rs
@@ -26,7 +26,7 @@ pub struct Slide {
     font: String,
     font_size: i32,
     stroke_size: i32,
-    stroke_color: Rgba,
+    stroke_color: Option<Rgba>,
     text_alignment: TextAlignment,
     audio: Option<PathBuf>,
     video_loop: bool,
@@ -756,8 +756,8 @@ mod test {
             Ok(_s) => {
                 assert!(true)
             }
-            Err(_e) => {
-                assert!(false)
+            Err(e) => {
+                assert!(false, "{:?}", e)
             }
         }
     }
diff --git a/test_presentation.ron b/test_presentation.ron
index bfe3218..f7b37ad 100644
--- a/test_presentation.ron
+++ b/test_presentation.ron
@@ -8,10 +8,13 @@
         text: "This is Frodo",
         font: "Quicksand",
         font_size: 50,
+        stroke_size: 0,
+        stroke_color: None,
         text_alignment: MiddleCenter,
         video_loop: false,
         video_start_time: 0.0,
         video_end_time: 0.0,
+        pdf_index: 0,
     ),
 
     (
@@ -23,9 +26,12 @@
         text: "This is Frodo",
         font: "Quicksand",
         font_size: 50,
+        stroke_size: 0,
+        stroke_color: None,
         text_alignment: MiddleCenter,
         video_loop: false,
         video_start_time: 0.0,
         video_end_time: 0.0,
+        pdf_index: 0,
     )
 ]