diff --git a/e2e/tests/binds.rs b/e2e/tests/binds.rs
index 8ed18440..a550a597 100644
--- a/e2e/tests/binds.rs
+++ b/e2e/tests/binds.rs
@@ -54,7 +54,7 @@ fn bind_append_and_select() -> Result<()> {
     let tmux = setup("a\\n\\nb\\nc", &["-m", "--bind", "'ctrl-f:append-and-select'"])?;
 
     tmux.send_keys(&[Str("xyz"), Ctrl(&Key('f'))])?;
-    tmux.until(|l| l[2] == ">>xyz")?;
+    tmux.until(|l| l.len() > 2 && l[2] == ">>xyz")?;
 
     Ok(())
 }
@@ -70,7 +70,7 @@ fn bind_reload_no_arg() -> Result<()> {
     tmux.until(|l| l[0].starts_with(">"))?;
 
     tmux.send_keys(&[Ctrl(&Key('a'))])?;
-    tmux.until(|l| l[2] == "> hello")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> hello")?;
 
     Ok(())
 }
@@ -79,9 +79,9 @@ fn bind_reload_no_arg() -> Result<()> {
 fn bind_reload_cmd() -> Result<()> {
     let tmux = setup("a\\n\\nb\\nc", &["--bind", "'ctrl-a:reload(echo hello)'"])?;
 
-    tmux.until(|l| l[2] == "> a")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> a")?;
     tmux.send_keys(&[Ctrl(&Key('a'))])?;
-    tmux.until(|l| l[2] == "> hello")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> hello")?;
 
     Ok(())
 }
diff --git a/e2e/tests/case.rs b/e2e/tests/case.rs
index 961ba175..080e8720 100644
--- a/e2e/tests/case.rs
+++ b/e2e/tests/case.rs
@@ -14,21 +14,21 @@ fn case_smart_lower() -> Result<()> {
     let tmux = setup("smart")?;
 
     tmux.send_keys(&[Str("abc")])?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))
 }
 #[test]
 fn case_smart_exact() -> Result<()> {
     let tmux = setup("smart")?;
 
     tmux.send_keys(&[Str("aBc")])?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))
 }
 #[test]
 fn case_smart_no_match() -> Result<()> {
     let tmux = setup("smart")?;
 
     tmux.send_keys(&[Str("Abc")])?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))
 }
 
 #[test]
@@ -36,28 +36,28 @@ fn case_ignore_lower() -> Result<()> {
     let tmux = setup("ignore")?;
 
     tmux.send_keys(&[Str("abc")])?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))
 }
 #[test]
 fn case_ignore_exact() -> Result<()> {
     let tmux = setup("ignore")?;
 
     tmux.send_keys(&[Str("aBc")])?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))
 }
 #[test]
 fn case_ignore_different() -> Result<()> {
     let tmux = setup("ignore")?;
 
     tmux.send_keys(&[Str("Abc")])?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))
 }
 #[test]
 fn case_ignore_no_match() -> Result<()> {
     let tmux = setup("ignore")?;
 
     tmux.send_keys(&[Str("z")])?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))
 }
 
 #[test]
@@ -65,19 +65,19 @@ fn case_respect_lower() -> Result<()> {
     let tmux = setup("respect")?;
 
     tmux.send_keys(&[Str("abc")])?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))
 }
 #[test]
 fn case_respect_exact() -> Result<()> {
     let tmux = setup("respect")?;
 
     tmux.send_keys(&[Str("aBc")])?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))
 }
 #[test]
 fn case_respect_no_match() -> Result<()> {
     let tmux = setup("respect")?;
 
     tmux.send_keys(&[Str("Abc")])?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))
 }
diff --git a/e2e/tests/defaults.rs b/e2e/tests/defaults.rs
index 13c2472c..88a7e788 100644
--- a/e2e/tests/defaults.rs
+++ b/e2e/tests/defaults.rs
@@ -24,8 +24,8 @@ fn default_command() -> Result<()> {
     let sk_cmd = sk(&outfile, &[]).replace("SKIM_DEFAULT_COMMAND=", "SKIM_DEFAULT_COMMAND='echo hello'");
     tmux.send_keys(&[Keys::Str(&sk_cmd), Keys::Enter])?;
     tmux.until(|l| l[0].starts_with(">"))?;
-    tmux.until(|l| l[1].starts_with("  1/1"))?;
-    tmux.until(|l| l[2] == "> hello")?;
+    tmux.until(|l| l.len() > 1 && l[1].starts_with("  1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> hello")?;
 
     tmux.send_keys(&[Keys::Enter])?;
     tmux.until(|l| !l[0].starts_with(">"))?;
diff --git a/e2e/tests/keys.rs b/e2e/tests/keys.rs
index 91703480..4b886a9c 100644
--- a/e2e/tests/keys.rs
+++ b/e2e/tests/keys.rs
@@ -15,8 +15,8 @@ fn keys_basic() -> Result<()> {
     tmux.until(|l| l[0].starts_with(">") && l[1].starts_with("  100000"))?;
     tmux.send_keys(&[Str("99")])?;
     tmux.until(|l| l[0] == "> 99")?;
-    tmux.until(|l| l[1].starts_with("  8146/100000"))?;
-    tmux.until(|l| l[2] == "> 99")?;
+    tmux.until(|l| l.len() > 1 && l[1].starts_with("  8146/100000"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> 99")?;
 
     Ok(())
 }
@@ -193,8 +193,8 @@ fn keys_ctrl_k() -> Result<()> {
     let _ = tmux.start_sk(Some("seq 1 100000"), &[]);
     tmux.until(|l| l[0].starts_with(">") && l[1].starts_with("  100000"))?;
     tmux.send_keys(&[Ctrl(&Key('k'))])?;
-    tmux.until(|l| l[2] == "  1")?;
-    tmux.until(|l| l[3] == "> 2")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "  1")?;
+    tmux.until(|l| l.len() > 3 && l[3] == "> 2")?;
 
     Ok(())
 }
@@ -205,12 +205,12 @@ fn keys_tab() -> Result<()> {
     let _ = tmux.start_sk(Some("seq 1 100000"), &[]);
     tmux.until(|l| l[0].starts_with(">") && l[1].starts_with("  100000"))?;
     tmux.send_keys(&[Ctrl(&Key('k'))])?;
-    tmux.until(|l| l[2] == "  1")?;
-    tmux.until(|l| l[3] == "> 2")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "  1")?;
+    tmux.until(|l| l.len() > 3 && l[3] == "> 2")?;
 
     tmux.send_keys(&[Tab])?;
-    tmux.until(|l| l[2] == "> 1")?;
-    tmux.until(|l| l[3] == "  2")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> 1")?;
+    tmux.until(|l| l.len() > 3 && l[3] == "  2")?;
 
     Ok(())
 }
@@ -221,8 +221,8 @@ fn keys_btab() -> Result<()> {
     let _ = tmux.start_sk(Some("seq 1 100000"), &[]);
     tmux.until(|l| l[0].starts_with(">") && l[1].starts_with("  100000"))?;
     tmux.send_keys(&[BTab])?;
-    tmux.until(|l| l[2] == "  1")?;
-    tmux.until(|l| l[3] == "> 2")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "  1")?;
+    tmux.until(|l| l.len() > 3 && l[3] == "> 2")?;
 
     Ok(())
 }
diff --git a/e2e/tests/keys_interactive.rs b/e2e/tests/keys_interactive.rs
index c3920583..107de557 100644
--- a/e2e/tests/keys_interactive.rs
+++ b/e2e/tests/keys_interactive.rs
@@ -15,8 +15,8 @@ fn keys_interactive_basic() -> Result<()> {
     tmux.until(|l| l[0].starts_with("c>") && l[1].starts_with("  100000"))?;
     tmux.send_keys(&[Str("99")])?;
     tmux.until(|l| l[0] == "c> 99")?;
-    tmux.until(|l| l[1].starts_with("  100000/100000"))?;
-    tmux.until(|l| l[2] == "> 1")?;
+    tmux.until(|l| l.len() > 1 && l[1].starts_with("  100000/100000"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> 1")?;
 
     Ok(())
 }
@@ -193,8 +193,8 @@ fn keys_interactive_ctrl_k() -> Result<()> {
     let _ = tmux.start_sk(Some("seq 1 100000"), &["-i"]);
     tmux.until(|l| l[0].starts_with("c>") && l[1].starts_with("  100000"))?;
     tmux.send_keys(&[Ctrl(&Key('k'))])?;
-    tmux.until(|l| l[2] == "  1")?;
-    tmux.until(|l| l[3] == "> 2")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "  1")?;
+    tmux.until(|l| l.len() > 3 && l[3] == "> 2")?;
 
     Ok(())
 }
@@ -205,12 +205,12 @@ fn keys_interactive_tab() -> Result<()> {
     let _ = tmux.start_sk(Some("seq 1 100000"), &["-i"]);
     tmux.until(|l| l[0].starts_with("c>") && l[1].starts_with("  100000"))?;
     tmux.send_keys(&[Ctrl(&Key('k'))])?;
-    tmux.until(|l| l[2] == "  1")?;
-    tmux.until(|l| l[3] == "> 2")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "  1")?;
+    tmux.until(|l| l.len() > 3 && l[3] == "> 2")?;
 
     tmux.send_keys(&[Tab])?;
-    tmux.until(|l| l[2] == "> 1")?;
-    tmux.until(|l| l[3] == "  2")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> 1")?;
+    tmux.until(|l| l.len() > 3 && l[3] == "  2")?;
 
     Ok(())
 }
@@ -221,8 +221,8 @@ fn keys_interactive_btab() -> Result<()> {
     let _ = tmux.start_sk(Some("seq 1 100000"), &["-i"]);
     tmux.until(|l| l[0].starts_with("c>") && l[1].starts_with("  100000"))?;
     tmux.send_keys(&[BTab])?;
-    tmux.until(|l| l[2] == "  1")?;
-    tmux.until(|l| l[3] == "> 2")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "  1")?;
+    tmux.until(|l| l.len() > 3 && l[3] == "> 2")?;
 
     Ok(())
 }
diff --git a/e2e/tests/options.rs b/e2e/tests/options.rs
index c0aaf646..f8eeb4b5 100644
--- a/e2e/tests/options.rs
+++ b/e2e/tests/options.rs
@@ -53,7 +53,7 @@ fn opt_with_nth_preview() -> Result<()> {
 fn opt_with_nth_1() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--with-nth", "1"])?;
 
-    tmux.until(|l| l[2] == "> f1,")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,")?;
 
     Ok(())
 }
@@ -61,7 +61,7 @@ fn opt_with_nth_1() -> Result<()> {
 fn opt_with_nth_2() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--with-nth", "2"])?;
 
-    tmux.until(|l| l[2] == "> f2,")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f2,")?;
 
     Ok(())
 }
@@ -69,7 +69,7 @@ fn opt_with_nth_2() -> Result<()> {
 fn opt_with_nth_4() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--with-nth", "4"])?;
 
-    tmux.until(|l| l[2] == "> f4")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f4")?;
 
     Ok(())
 }
@@ -77,7 +77,7 @@ fn opt_with_nth_4() -> Result<()> {
 fn opt_with_nth_oob() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--with-nth", "5"])?;
 
-    tmux.until(|l| l[2] == ">")?;
+    tmux.until(|l| l.len() > 2 && l[2] == ">")?;
 
     Ok(())
 }
@@ -85,7 +85,7 @@ fn opt_with_nth_oob() -> Result<()> {
 fn opt_with_nth_neg_1() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--with-nth=-1"])?;
 
-    tmux.until(|l| l[2] == "> f4")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f4")?;
 
     Ok(())
 }
@@ -93,7 +93,7 @@ fn opt_with_nth_neg_1() -> Result<()> {
 fn opt_with_nth_neg_2() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--with-nth=-2"])?;
 
-    tmux.until(|l| l[2] == "> f3,")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f3,")?;
 
     Ok(())
 }
@@ -101,7 +101,7 @@ fn opt_with_nth_neg_2() -> Result<()> {
 fn opt_with_nth_neg_4() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--with-nth=-4"])?;
 
-    tmux.until(|l| l[2] == "> f1,")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,")?;
 
     Ok(())
 }
@@ -109,7 +109,7 @@ fn opt_with_nth_neg_4() -> Result<()> {
 fn opt_with_nth_neg_oob() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--with-nth=-5"])?;
 
-    tmux.until(|l| l[2] == ">")?;
+    tmux.until(|l| l.len() > 2 && l[2] == ">")?;
 
     Ok(())
 }
@@ -117,7 +117,7 @@ fn opt_with_nth_neg_oob() -> Result<()> {
 fn opt_with_nth_range_to_end() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--with-nth", "2.."])?;
 
-    tmux.until(|l| l[2] == "> f2,f3,f4")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f2,f3,f4")?;
 
     Ok(())
 }
@@ -125,7 +125,7 @@ fn opt_with_nth_range_to_end() -> Result<()> {
 fn opt_with_nth_range_from_start() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--with-nth", "..3"])?;
 
-    tmux.until(|l| l[2] == "> f1,f2,f3,")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,")?;
 
     Ok(())
 }
@@ -133,7 +133,7 @@ fn opt_with_nth_range_from_start() -> Result<()> {
 fn opt_with_nth_range_closed() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--with-nth", "2..3"])?;
 
-    tmux.until(|l| l[2] == "> f2,f3,")?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f2,f3,")?;
 
     Ok(())
 }
@@ -141,7 +141,7 @@ fn opt_with_nth_range_closed() -> Result<()> {
 fn opt_with_nth_range_dec() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--with-nth", "3..2"])?;
 
-    tmux.until(|l| l[2] == ">")?;
+    tmux.until(|l| l.len() > 2 && l[2] == ">")?;
 
     Ok(())
 }
@@ -152,15 +152,15 @@ fn opt_nth_1() -> Result<()> {
 
     tmux.send_keys(&[Str("1")])?;
     tmux.until(|l| l[0] == "> 1")?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))?;
-    tmux.until(|l| l[2] == "> f1,f2,f3,f4")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,f4")?;
 
     tmux.send_keys(&[Ctrl(&Key('w'))])?;
     tmux.until(|l| l[0] == ">")?;
 
     tmux.send_keys(&[Str("2")])?;
     tmux.until(|l| l[0] == "> 2")?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))?;
 
     Ok(())
 }
@@ -170,15 +170,15 @@ fn opt_nth_2() -> Result<()> {
 
     tmux.send_keys(&[Str("2")])?;
     tmux.until(|l| l[0] == "> 2")?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))?;
-    tmux.until(|l| l[2] == "> f1,f2,f3,f4")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,f4")?;
 
     tmux.send_keys(&[Ctrl(&Key('w'))])?;
     tmux.until(|l| l[0] == ">")?;
 
     tmux.send_keys(&[Str("1")])?;
     tmux.until(|l| l[0] == "> 1")?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))?;
 
     Ok(())
 }
@@ -188,15 +188,15 @@ fn opt_nth_4() -> Result<()> {
 
     tmux.send_keys(&[Str("4")])?;
     tmux.until(|l| l[0] == "> 4")?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))?;
-    tmux.until(|l| l[2] == "> f1,f2,f3,f4")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,f4")?;
 
     tmux.send_keys(&[Ctrl(&Key('w'))])?;
     tmux.until(|l| l[0] == ">")?;
 
     tmux.send_keys(&[Str("1")])?;
     tmux.until(|l| l[0] == "> 1")?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))?;
 
     Ok(())
 }
@@ -204,12 +204,12 @@ fn opt_nth_4() -> Result<()> {
 fn opt_nth_oob() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--nth", "5"])?;
 
-    tmux.until(|l| l[1].trim().starts_with("1/1"))?;
-    tmux.until(|l| l[2] == "> f1,f2,f3,f4")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,f4")?;
 
     tmux.send_keys(&[Str("1")])?;
     tmux.until(|l| l[0] == "> 1")?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))?;
 
     Ok(())
 }
@@ -219,15 +219,15 @@ fn opt_nth_neg_1() -> Result<()> {
 
     tmux.send_keys(&[Str("4")])?;
     tmux.until(|l| l[0] == "> 4")?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))?;
-    tmux.until(|l| l[2] == "> f1,f2,f3,f4")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,f4")?;
 
     tmux.send_keys(&[Ctrl(&Key('w'))])?;
     tmux.until(|l| l[0] == ">")?;
 
     tmux.send_keys(&[Str("1")])?;
     tmux.until(|l| l[0] == "> 1")?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))?;
 
     Ok(())
 }
@@ -237,15 +237,15 @@ fn opt_nth_neg_2() -> Result<()> {
 
     tmux.send_keys(&[Str("3")])?;
     tmux.until(|l| l[0] == "> 3")?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))?;
-    tmux.until(|l| l[2] == "> f1,f2,f3,f4")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,f4")?;
 
     tmux.send_keys(&[Ctrl(&Key('w'))])?;
     tmux.until(|l| l[0] == ">")?;
 
     tmux.send_keys(&[Str("1")])?;
     tmux.until(|l| l[0] == "> 1")?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))?;
 
     Ok(())
 }
@@ -255,15 +255,15 @@ fn opt_nth_neg_4() -> Result<()> {
 
     tmux.send_keys(&[Str("1")])?;
     tmux.until(|l| l[0] == "> 1")?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))?;
-    tmux.until(|l| l[2] == "> f1,f2,f3,f4")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,f4")?;
 
     tmux.send_keys(&[Ctrl(&Key('w'))])?;
     tmux.until(|l| l[0] == ">")?;
 
     tmux.send_keys(&[Str("2")])?;
     tmux.until(|l| l[0] == "> 2")?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))?;
 
     Ok(())
 }
@@ -271,12 +271,12 @@ fn opt_nth_neg_4() -> Result<()> {
 fn opt_nth_neg_oob() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--nth=-5"])?;
 
-    tmux.until(|l| l[1].trim().starts_with("1/1"))?;
-    tmux.until(|l| l[2] == "> f1,f2,f3,f4")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,f4")?;
 
     tmux.send_keys(&[Str("1")])?;
     tmux.until(|l| l[0] == "> 1")?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))?;
 
     Ok(())
 }
@@ -286,15 +286,15 @@ fn opt_nth_range_to_end() -> Result<()> {
 
     tmux.send_keys(&[Str("3")])?;
     tmux.until(|l| l[0] == "> 3")?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))?;
-    tmux.until(|l| l[2] == "> f1,f2,f3,f4")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,f4")?;
 
     tmux.send_keys(&[Ctrl(&Key('w'))])?;
     tmux.until(|l| l[0] == ">")?;
 
     tmux.send_keys(&[Str("1")])?;
     tmux.until(|l| l[0] == "> 1")?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))?;
 
     Ok(())
 }
@@ -304,15 +304,15 @@ fn opt_nth_range_from_start() -> Result<()> {
 
     tmux.send_keys(&[Str("1")])?;
     tmux.until(|l| l[0] == "> 1")?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))?;
-    tmux.until(|l| l[2] == "> f1,f2,f3,f4")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,f4")?;
 
     tmux.send_keys(&[Ctrl(&Key('w'))])?;
     tmux.until(|l| l[0] == ">")?;
 
     tmux.send_keys(&[Str("4")])?;
     tmux.until(|l| l[0] == "> 4")?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))?;
 
     Ok(())
 }
@@ -322,42 +322,42 @@ fn opt_nth_range_closed() -> Result<()> {
 
     tmux.send_keys(&[Str("2")])?;
     tmux.until(|l| l[0] == "> 2")?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))?;
-    tmux.until(|l| l[2] == "> f1,f2,f3,f4")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,f4")?;
 
     tmux.send_keys(&[Ctrl(&Key('w'))])?;
     tmux.until(|l| l[0] == ">")?;
 
     tmux.send_keys(&[Str("3")])?;
     tmux.until(|l| l[0] == "> 3")?;
-    tmux.until(|l| l[1].trim().starts_with("1/1"))?;
-    tmux.until(|l| l[2] == "> f1,f2,f3,f4")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,f4")?;
 
     tmux.send_keys(&[Ctrl(&Key('w'))])?;
     tmux.until(|l| l[0] == ">")?;
 
     tmux.send_keys(&[Str("1")])?;
     tmux.until(|l| l[0] == "> 1")?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))?;
 
     tmux.send_keys(&[Ctrl(&Key('w'))])?;
     tmux.until(|l| l[0] == ">")?;
 
     tmux.send_keys(&[Str("4")])?;
     tmux.until(|l| l[0] == "> 4")?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))?;
     Ok(())
 }
 #[test]
 fn opt_nth_range_dec() -> Result<()> {
     let (tmux, _) = setup("f1,f2,f3,f4", &["--delimiter", ",", "--nth", "3..2"])?;
 
-    tmux.until(|l| l[1].trim().starts_with("1/1"))?;
-    tmux.until(|l| l[2] == "> f1,f2,f3,f4")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("1/1"))?;
+    tmux.until(|l| l.len() > 2 && l[2] == "> f1,f2,f3,f4")?;
 
     tmux.send_keys(&[Str("1")])?;
     tmux.until(|l| l[0] == "> 1")?;
-    tmux.until(|l| l[1].trim().starts_with("0/1"))?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/1"))?;
 
     Ok(())
 }
@@ -407,7 +407,7 @@ fn opt_print_cmd_and_query() -> Result<()> {
 fn opt_hscroll_begin() -> Result<()> {
     let (tmux, _) = setup(&format!("b{}", &["a"; 1000].join("")), &["-q", "b"])?;
 
-    tmux.until(|l| l[2].ends_with(".."))
+    tmux.until(|l| l.len() > 2 && l[2].ends_with(".."))
 }
 #[test]
 fn opt_hscroll_middle() -> Result<()> {
@@ -416,41 +416,41 @@ fn opt_hscroll_middle() -> Result<()> {
         &["-q", "b"],
     )?;
 
-    tmux.until(|l| l[2].ends_with(".."))?;
-    tmux.until(|l| l[2].starts_with("> .."))
+    tmux.until(|l| l.len() > 2 && l[2].ends_with(".."))?;
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> .."))
 }
 #[test]
 fn opt_hscroll_end() -> Result<()> {
     let (tmux, _) = setup(&format!("{}b", &["a"; 1000].join("")), &["-q", "b"])?;
 
-    tmux.until(|l| l[2].starts_with("> .."))
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> .."))
 }
 
 #[test]
 fn opt_no_hscroll() -> Result<()> {
     let (tmux, _) = setup(&format!("{}b", &["a"; 1000].join("")), &["-q", "b", "--no-hscroll"])?;
 
-    tmux.until(|l| !l[2].starts_with("> .."))?;
-    tmux.until(|l| l[2].ends_with(".."))
+    tmux.until(|l| !l.len() > 2 && l[2].starts_with("> .."))?;
+    tmux.until(|l| l.len() > 2 && l[2].ends_with(".."))
 }
 
 #[test]
 fn opt_tabstop_default() -> Result<()> {
     let (tmux, _) = setup("a\\tb", &[])?;
 
-    tmux.until(|l| l[2].trim() == "> a       b")
+    tmux.until(|l| l.len() > 2 && l[2].trim() == "> a       b")
 }
 #[test]
 fn opt_tabstop_1() -> Result<()> {
     let (tmux, _) = setup("a\\tb", &["--tabstop", "1"])?;
 
-    tmux.until(|l| l[2].trim() == "> a b")
+    tmux.until(|l| l.len() > 2 && l[2].trim() == "> a b")
 }
 #[test]
 fn opt_tabstop_3() -> Result<()> {
     let (tmux, _) = setup("aa\\tb", &["--tabstop", "3"])?;
 
-    tmux.until(|l| l[2].trim() == "> aa b")
+    tmux.until(|l| l.len() > 2 && l[2].trim() == "> aa b")
 }
 
 #[test]
@@ -467,13 +467,13 @@ fn opt_inline_info() -> Result<()> {
 fn opt_header_only() -> Result<()> {
     let (tmux, _) = setup("a\\nb\\nc", &["--header", "test_header"])?;
 
-    tmux.until(|l| l[2].trim() == "test_header")
+    tmux.until(|l| l.len() > 2 && l[2].trim() == "test_header")
 }
 #[test]
 fn opt_header_inline_info() -> Result<()> {
     let (tmux, _) = setup("a\\nb\\nc", &["--header", "test_header", "--inline-info"])?;
 
-    tmux.until(|l| l[1].trim() == "test_header")
+    tmux.until(|l| l.len() > 1 && l[1].trim() == "test_header")
 }
 #[test]
 fn opt_header_reverse() -> Result<()> {
@@ -505,7 +505,7 @@ fn opt_header_lines_1() -> Result<()> {
     let (tmux, _) = setup("a\\nb\\nc", &["--header-lines", "1"])?;
 
     tmux.until(|l| !l[2].starts_with(">") && l[2].trim() == "a")?;
-    tmux.until(|l| l[3].starts_with(">"))
+    tmux.until(|l| l.len() > 3 && l[3].starts_with(">"))
 }
 #[test]
 fn opt_header_lines_all() -> Result<()> {
@@ -699,13 +699,13 @@ fn opt_multiple_flags_combined_nth() -> Result<()> {
     let (tmux, _) = setup("a b c\\nd e f", &["--nth 1,2"])?;
 
     tmux.send_keys(&[Key('c')])?;
-    tmux.until(|l| l[1].contains("0/2"))
+    tmux.until(|l| l.len() > 1 && l[1].contains("0/2"))
 }
 #[test]
 fn opt_multiple_flags_combined_with_nth() -> Result<()> {
     let (tmux, _) = setup("a b c\\nd e f", &["--with-nth 1,2"])?;
 
-    tmux.until(|l| l[2].ends_with("a b") && l[3].ends_with("d e"))
+    tmux.until(|l| l.len() > 2 && l[2].ends_with("a b") && l[3].ends_with("d e"))
 }
 
 #[test]
@@ -724,7 +724,7 @@ fn opt_ansi_null() -> Result<()> {
 fn opt_skip_to_pattern() -> Result<()> {
     let (tmux, _) = setup("a/b/c", &["--skip-to-pattern", "'[^/]*$'"])?;
 
-    tmux.until(|l| l[2] == "> ..c")
+    tmux.until(|l| l.len() > 2 && l[2] == "> ..c")
 }
 
 #[test]
@@ -732,7 +732,7 @@ fn opt_multi() -> Result<()> {
     let (tmux, outfile) = setup("a\\nb\\nc", &["--multi"])?;
 
     tmux.send_keys(&[BTab, BTab])?;
-    tmux.until(|l| l[2] == " >a" && l[3] == " >b")?;
+    tmux.until(|l| l.len() > 2 && l[2] == " >a" && l[3] == " >b")?;
     tmux.send_keys(&[Enter])?;
 
     let output = tmux.output(&outfile)?;
@@ -746,19 +746,19 @@ fn opt_multi() -> Result<()> {
 #[test]
 fn opt_pre_select_n() -> Result<()> {
     let (tmux, _) = setup("a\\nb\\nc", &["-m", "--pre-select-n", "2"])?;
-    tmux.until(|l| l[2] == ">>a" && l[3] == " >b")
+    tmux.until(|l| l.len() > 2 && l[2] == ">>a" && l[3] == " >b")
 }
 
 #[test]
 fn opt_pre_select_items() -> Result<()> {
     let (tmux, _) = setup("a\\nb\\nc", &["-m", "--pre-select-items", "$'b\\nc'"])?;
-    tmux.until(|l| l[2] == "> a" && l[3].trim() == ">b" && l[4].trim() == ">c")
+    tmux.until(|l| l.len() > 2 && l[2] == "> a" && l[3].trim() == ">b" && l[4].trim() == ">c")
 }
 
 #[test]
 fn opt_pre_select_pat() -> Result<()> {
     let (tmux, _) = setup("a\\nb\\nc", &["-m", "--pre-select-pat", "'[b|c]'"])?;
-    tmux.until(|l| l[2] == "> a" && l[3].trim() == ">b" && l[4].trim() == ">c")
+    tmux.until(|l| l.len() > 2 && l[2] == "> a" && l[3].trim() == ">b" && l[4].trim() == ">c")
 }
 
 #[test]
@@ -769,7 +769,7 @@ fn opt_pre_select_file() -> Result<()> {
         "a\\nb\\nc",
         &["-m", "--pre-select-file", pre_select_file.path().to_str().unwrap()],
     )?;
-    tmux.until(|l| l[2] == "> a" && l[3].trim() == ">b" && l[4].trim() == ">c")
+    tmux.until(|l| l.len() > 2 && l[2] == "> a" && l[3].trim() == ">b" && l[4].trim() == ">c")
 }
 
 #[test]
@@ -784,9 +784,9 @@ fn opt_no_clear_if_empty() -> Result<()> {
     tmux.send_keys(&[Str("xxxx")])?;
     tmux.until(|l| l[0] == "c> xxxx")?;
 
-    tmux.until(|l| l[1].trim().starts_with("0/0"))?;
-    tmux.until(|l| l[2].trim() == "> a")?;
-    tmux.until(|l| l[3].trim() == "b")?;
+    tmux.until(|l| l.len() > 1 && l[1].trim().starts_with("0/0"))?;
+    tmux.until(|l| l.len() > 2 && l[2].trim() == "> a")?;
+    tmux.until(|l| l.len() > 3 && l[3].trim() == "b")?;
     Ok(())
 }
 
diff --git a/e2e/tests/tiebreak.rs b/e2e/tests/tiebreak.rs
index 95343283..8d4034d2 100644
--- a/e2e/tests/tiebreak.rs
+++ b/e2e/tests/tiebreak.rs
@@ -15,74 +15,74 @@ fn setup(input: &str, tiebreak: &str) -> Result<TmuxController> {
 #[test]
 fn tiebreak_default() -> Result<()> {
     let tmux = setup("a\\nc\\nab\\nac\\nb", "score,begin,end")?;
-    tmux.until(|l| l[2].starts_with("> a"))?;
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> a"))?;
     tmux.send_keys(&[Key('b')])?;
-    tmux.until(|l| l[2].starts_with("> b"))
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> b"))
 }
 #[test]
 fn tiebreak_neg_score() -> Result<()> {
     let tmux = setup("a\\nb\\nc\\nab\\nac", "-score")?;
-    tmux.until(|l| l[2].starts_with("> a"))?;
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> a"))?;
     tmux.send_keys(&[Key('b')])?;
-    tmux.until(|l| l[2].starts_with("> ab"))
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> ab"))
 }
 
 #[test]
 fn tiebreak_index() -> Result<()> {
     let tmux = setup("a\\nc\\nab\\nac\\nb", "index,score")?;
-    tmux.until(|l| l[2].starts_with("> a"))?;
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> a"))?;
     tmux.send_keys(&[Key('b')])?;
-    tmux.until(|l| l[2].starts_with("> ab"))
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> ab"))
 }
 #[test]
 fn tiebreak_neg_index() -> Result<()> {
     let tmux = setup("a\\nb\\nc\\nab\\nac", "-index,score")?;
-    tmux.until(|l| l[2].starts_with("> a"))?;
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> a"))?;
     tmux.send_keys(&[Key('b')])?;
-    tmux.until(|l| l[2].starts_with("> ab"))
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> ab"))
 }
 
 #[test]
 fn tiebreak_begin() -> Result<()> {
     let tmux = setup("aaba\\nb\\nc\\naba\\nac", "begin,score")?;
-    tmux.until(|l| l[2].starts_with("> aaba"))?;
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> aaba"))?;
     tmux.send_keys(&[Str("ba")])?;
-    tmux.until(|l| l[2].starts_with("> aba"))
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> aba"))
 }
 #[test]
 fn tiebreak_neg_begin() -> Result<()> {
     let tmux = setup("aba\\nb\\nc\\naaba\\nac", "-begin,score")?;
-    tmux.until(|l| l[2].starts_with("> a"))?;
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> a"))?;
     tmux.send_keys(&[Key('b')])?;
-    tmux.until(|l| l[2].starts_with("> aaba"))
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> aaba"))
 }
 
 #[test]
 fn tiebreak_end() -> Result<()> {
     let tmux = setup("aaba\\nb\\nc\\naba\\nac", "end,score")?;
-    tmux.until(|l| l[2].starts_with("> aaba"))?;
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> aaba"))?;
     tmux.send_keys(&[Str("ba")])?;
-    tmux.until(|l| l[2].starts_with("> aba"))
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> aba"))
 }
 #[test]
 fn tiebreak_neg_end() -> Result<()> {
     let tmux = setup("aba\\nb\\nc\\naaba\\nac", "-end,score")?;
-    tmux.until(|l| l[2].starts_with("> a"))?;
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> a"))?;
     tmux.send_keys(&[Str("ba")])?;
-    tmux.until(|l| l[2].starts_with("> aaba"))
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> aaba"))
 }
 
 #[test]
 fn tiebreak_length() -> Result<()> {
     let tmux = setup("aaba\\nb\\nc\\naba\\nac", "length,score")?;
-    tmux.until(|l| l[2].starts_with("> b"))?;
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> b"))?;
     tmux.send_keys(&[Str("ba")])?;
-    tmux.until(|l| l[2].starts_with("> aba"))
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> aba"))
 }
 #[test]
 fn tiebreak_neg_length() -> Result<()> {
     let tmux = setup("aaba\\nb\\nc\\naba\\nac", "-length,score")?;
-    tmux.until(|l| l[2].starts_with("> aaba"))?;
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> aaba"))?;
     tmux.send_keys(&[Key('c')])?;
-    tmux.until(|l| l[2].starts_with("> ac"))
+    tmux.until(|l| l.len() > 2 && l[2].starts_with("> ac"))
 }