diff --git a/src/lib.rs b/src/lib.rs
index 79ae374..ff40935 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -385,7 +385,10 @@ impl SmartString {
     }
 
     fn pop(&mut self) -> Option<char> {
-        todo!()
+        self.fragments.iter_mut()
+            .filter(|(visible, string)| *visible && !string.is_empty())
+            .last()
+            .and_then(|(_, string)| string.pop())
     }
 
     fn push(&mut self, ch: char) {
diff --git a/src/test.rs b/src/test.rs
index c67cca2..f2821a0 100644
--- a/src/test.rs
+++ b/src/test.rs
@@ -538,7 +538,7 @@ fn color_codes() {
 fn color_codes_in_header() {
     let mut config = AsciiTable::default();
     let text = "Hello".color(Color::Blue).bg_color(Color::Yellow).bold();
-    config.columns.insert(0, Column {header: text, ..Column::default()});
+    config.columns.insert(0, Column {header: text.to_string(), ..Column::default()});
     let input = vec![&[""]];
     let expected = "┌───────┐\n\
                     │ \u{1b}[38;5;4m\u{1b}[48;5;3;1mHello\u{1b}[0m │\n\