diff --git a/rust/rox/src/interpreter.rs b/rust/rox/src/interpreter.rs
index 30fd264..819092c 100644
--- a/rust/rox/src/interpreter.rs
+++ b/rust/rox/src/interpreter.rs
@@ -17,21 +17,21 @@ use crate::{
 
 #[derive(Error, Debug)]
 pub enum InterpreterError {
-    #[error("[line {0}] MINUS unary expression expects a number on the right")]
+    #[error("line {0}: MINUS unary expression expects a number on the right")]
     UnaryExpressionNotANumber(usize),
-    #[error("[line {0}] unknown unary operator: {1}")]
+    #[error("line {0}: unknown unary operator: {1}")]
     UnaryOperatorUnknown(usize, String),
-    #[error("[line {0}] unknown binary operator: {1}")]
+    #[error("line {0}: unknown binary operator: {1}")]
     BinaryOperatorUnknown(usize, String),
-    #[error("[line {0}] left or right is not a number.")]
+    #[error("line {0}: left or right is not a number.")]
     BinaryExpressionNeedsNumber(usize),
-    #[error("[line {0}] left or right is neither a number nor string.")]
+    #[error("line {0}: left or right is neither a number nor string.")]
     BinaryExpressionNeedsNumberOrString(usize),
     #[error("{0}")]
     UndefinedVariable(EnvironmentError),
-    #[error("[line {0}] {1} is not callable.")]
+    #[error("line {0}: {1} is not callable.")]
     NotACallable(usize, Value),
-    #[error("[line {0}] {1}.")]
+    #[error("line {0}: {1}.")]
     FailedToCall(usize, CallingError),
 }
 
diff --git a/rust/rox/src/parser.rs b/rust/rox/src/parser.rs
index 1d0892c..6952a5c 100644
--- a/rust/rox/src/parser.rs
+++ b/rust/rox/src/parser.rs
@@ -13,49 +13,49 @@ use tracing::error;
 pub enum ParserError {
     #[error("empty token stream")]
     NoTokens,
-    #[error("[line {0}] expected expression")]
+    #[error("line {0}: expected expression")]
     ExpressionExpected(usize),
-    #[error("[line {0}] expected ')' after expression.")]
+    #[error("line {0}: expected ')' after expression.")]
     ParenAfterExpression(usize),
-    #[error("[Out of bounds access at index {0}.")]
+    #[error("Out of bounds access at index {0}.")]
     OutOfBoundsAccess(usize),
-    #[error("[line {0}] literal expected.")]
+    #[error("line {0}: literal expected.")]
     LiteralExpected(usize),
-    #[error("[line {0}] expected ';' after value.")]
+    #[error("line {0}: expected ';' after value.")]
     SemicolonAfterValueExpected(usize),
-    #[error("[line {0}] expected ';' after expression.")]
+    #[error("line {0}: expected ';' after expression.")]
     SemicolonAfterExpressionExpected(usize),
-    #[error("[line {0}] expected variable name.")]
+    #[error("line {0}: expected variable name.")]
     VariableNameExpected(usize),
-    #[error("[line {0}] invalid assignment target.")]
+    #[error("line {0}: invalid assignment target.")]
     InvalidAssignmentTarget(usize),
-    #[error("[line {0}] expected '}}' after block.")]
+    #[error("line {0}: expected '}}' after block.")]
     RightBraceAfterBlockExpected(usize),
-    #[error("[line {0}] expected '(' after if.")]
+    #[error("line {0}: expected '(' after if.")]
     LeftParenAfterIfExpected(usize),
-    #[error("[line {0}] expected ')' after condition.")]
+    #[error("line {0}: expected ')' after condition.")]
     RightParenAfterConditionExpected(usize),
-    #[error("[line {0}] expected '(' after while.")]
+    #[error("line {0}: expected '(' after while.")]
     LeftParenAfterWhileExpected(usize),
-    #[error("[line {0}] expected '(' after for.")]
+    #[error("line {0}: expected '(' after for.")]
     LeftParenAfterForExpected(usize),
-    #[error("[line {0}] expected ';' after loop condition.")]
+    #[error("line {0}: expected ';' after loop condition.")]
     SemicolonAfterLoopConditionExpected(usize),
-    #[error("[line {0}] expected ')' after for clauses.")]
+    #[error("line {0}: expected ')' after for clauses.")]
     RightParenAfterForClausesExpected(usize),
-    #[error("[line {0}] expected ')' after arguments.")]
+    #[error("line {0}: expected ')' after arguments.")]
     RightParenAfterArgumentsExpected(usize),
-    #[error("[line {0}] expected function name.")]
+    #[error("line {0}: expected function name.")]
     FunctionNameExpected(usize),
-    #[error("[line {0}] expected '(' after function name.")]
+    #[error("line {0}: expected '(' after function name.")]
     LeftParenAfterFunctionNameExpected(usize),
-    #[error("[line {0}] expected ')' after parameters.")]
+    #[error("line {0}: expected ')' after parameters.")]
     RightParenAfterParamsExpected(usize),
-    #[error("[line {0}] expected parameter name.")]
+    #[error("line {0}: expected parameter name.")]
     ParamNameExpected(usize),
-    #[error("[line {0}] expected '{{' before function body.")]
+    #[error("line {0}: expected '{{' before function body.")]
     LeftBraceBeforeFunctionBodyExpected(usize),
-    #[error("[line {0}] expected ';' after return value.")]
+    #[error("line {0}: expected ';' after return value.")]
     SemicolonAfterReturnExpected(usize),
 }