diff --git a/xtests/errors.toml b/xtests/errors.toml
index ed50d9d..7ca0a08 100644
--- a/xtests/errors.toml
+++ b/xtests/errors.toml
@@ -1,3 +1,22 @@
+# Command-line errors
+
+[[cmd]]
+name = "‘exa --aoeu’ displays an error"
+shell = "exa --aoeu"
+stdout = { empty = true }
+stderr = { file = "outputs/error_invalid_option.ansitxt" }
+status = 3
+tags = [ 'error' ]
+
+[[cmd]]
+name = "‘exa -Taa’ displays an error"
+shell = "exa -Taa"
+stdout = { empty = true }
+stderr = { file = "outputs/error_tree_all_all.ansitxt" }
+status = 3
+tags = [ 'error' ]
+
+
 # Error suggestions
 
 [[cmd]]
diff --git a/xtests/outputs/error_invalid_option.ansitxt b/xtests/outputs/error_invalid_option.ansitxt
new file mode 100644
index 0000000..39825d4
--- /dev/null
+++ b/xtests/outputs/error_invalid_option.ansitxt
@@ -0,0 +1 @@
+exa: Unknown argument --aoeu
diff --git a/xtests/outputs/error_tree_all_all.ansitxt b/xtests/outputs/error_tree_all_all.ansitxt
new file mode 100644
index 0000000..b7e21c2
--- /dev/null
+++ b/xtests/outputs/error_tree_all_all.ansitxt
@@ -0,0 +1 @@
+exa: Option --tree is useless given --all --all