diff --git a/src/model/markers/found.rs b/src/model/markers/found.rs
index db4b26a..051c5ca 100644
--- a/src/model/markers/found.rs
+++ b/src/model/markers/found.rs
@@ -13,7 +13,9 @@ impl FoundMarkers {
 impl std::fmt::Display for FoundMarkers {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         for marker in self.markers.iter() {
-            write!(f, "- {marker}")?;
+            // if !matches!(marker, Marker::Unmarked) {
+            write!(f, "{marker}")?;
+            // }
         }
         Ok(())
     }
diff --git a/src/model/markers/marker.rs b/src/model/markers/marker.rs
index e411dfc..7c04856 100644
--- a/src/model/markers/marker.rs
+++ b/src/model/markers/marker.rs
@@ -13,8 +13,8 @@ impl std::fmt::Display for Marker {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
             Marker::Unmarked => Ok(()),
-            Marker::Invalid(line) => write!(f, "Invalid: {line}"),
-            Marker::Valid(line, _) => write!(f, "Valid  : {line}"),
+            Marker::Invalid(line) => write!(f, "- Invalid: {line}"),
+            Marker::Valid(line, _) => write!(f, "- Valid  : {line}"),
         }
     }
 }
diff --git a/src/model/markers/mod.rs b/src/model/markers/mod.rs
index c6f6f0b..ad11a0a 100644
--- a/src/model/markers/mod.rs
+++ b/src/model/markers/mod.rs
@@ -3,5 +3,8 @@ mod found;
 mod issue;
 mod marker;
 
+#[cfg(test)]
+mod tests;
+
 pub use found::FoundMarkers;
 pub use marker::Marker;
diff --git a/src/model/markers/tests/found.rs b/src/model/markers/tests/found.rs
new file mode 100644
index 0000000..49f5dc9
--- /dev/null
+++ b/src/model/markers/tests/found.rs
@@ -0,0 +1,57 @@
+use crate::model::Line;
+
+//
+use super::*;
+
+#[test]
+fn found_when_displayed() -> anyhow::Result<()> {
+    //given
+    let fs = kxio::fs::temp()?;
+    let file = fs.base().join("file-name");
+    let relative = file.strip_prefix(fs.base())?.to_path_buf();
+
+    let mut found = FoundMarkers::default();
+
+    let marker_unmarked = Line::builder()
+        .file(file.clone())
+        .relative_path(relative.clone())
+        .num(10)
+        .value("line with no comment".to_owned())
+        .build()
+        .into_marker()?;
+    let marker_invalid = Line::builder()
+        .file(file.clone())
+        .relative_path(relative.clone())
+        .num(10)
+        .value("line // TODO: comment".to_owned())
+        .build()
+        .into_marker()?;
+    let marker_valid = Line::builder()
+        .file(file)
+        .relative_path(relative)
+        .num(11)
+        .value("line // TODO: (#13) do this".to_owned())
+        .build()
+        .into_marker()?;
+
+    found.add_marker(marker_unmarked);
+    found.add_marker(marker_invalid);
+    found.add_marker(marker_valid);
+
+    //when
+    let markers_as_string = found.to_string();
+    let result = markers_as_string.lines().collect::<Vec<&str>>();
+
+    //then
+    assert_eq!(
+        result,
+        vec![
+            "- Invalid: file-name#10:",
+            " line // TODO: comment",
+            "- Valid  : file-name#11:",
+            " line // TODO: (#13) do this"
+        ]
+    );
+
+    Ok(())
+}
diff --git a/src/model/markers/tests/issue.rs b/src/model/markers/tests/issue.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/model/markers/tests/marker.rs b/src/model/markers/tests/marker.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/model/markers/tests/mod.rs b/src/model/markers/tests/mod.rs
new file mode 100644
index 0000000..998aef3
--- /dev/null
+++ b/src/model/markers/tests/mod.rs
@@ -0,0 +1,6 @@
+//
+use super::*;
+
+mod found;
+mod issue;
+mod marker;