diff --git a/vlib/v/checker/tests/void_function_assign_to_string.vv b/vlib/v/checker/tests/void_function_assign_to_string.vv
index 839d84d00c..fddd5fca80 100644
--- a/vlib/v/checker/tests/void_function_assign_to_string.vv
+++ b/vlib/v/checker/tests/void_function_assign_to_string.vv
@@ -1,4 +1,4 @@
-fn x(x,y int) {
+fn x(x int,y int) {
 
 }
 fn main(){
diff --git a/vlib/v/tests/inout/compiler_test.v b/vlib/v/tests/inout/compiler_test.v
index 3d4c3e5bab..73f22bf2cb 100644
--- a/vlib/v/tests/inout/compiler_test.v
+++ b/vlib/v/tests/inout/compiler_test.v
@@ -90,7 +90,7 @@ fn test_all() {
 	assert total_errors == 0
 }
 
-fn normalize_panic_message(message, vroot string) string {
+fn normalize_panic_message(message string, vroot string) string {
 	mut msg := message.all_before('=========================================')
 	msg = msg.replace(vroot + os.path_separator, '')
 	msg = msg.trim_space()
diff --git a/vlib/v/tests/repl/runner/runner.v b/vlib/v/tests/repl/runner/runner.v
index bbee1a04ce..f8b3113ee3 100644
--- a/vlib/v/tests/repl/runner/runner.v
+++ b/vlib/v/tests/repl/runner/runner.v
@@ -34,14 +34,14 @@ pub fn full_path_to_v(dirs_in int) string {
 	return vexec
 }
 
-fn diff_files(file_result, file_expected string) string {
+fn diff_files(file_result string, file_expected string) string {
 	diffcmd := util.find_working_diff_command() or {
 		return err
 	}
 	return util.color_compare_files(diffcmd, file_result, file_expected)
 }
 
-pub fn run_repl_file(wd, vexec, file string) ?string {
+pub fn run_repl_file(wd string, vexec string, file string) ?string {
 	vexec_folder := os.dir(vexec) + os.path_separator
 	fcontent := os.read_file(file) or {
 		return error('Could not read file $file')
@@ -60,8 +60,7 @@ pub fn run_repl_file(wd, vexec, file string) ?string {
 	}
 	os.rm(input_temporary_filename)
 	result := r.output.replace('\r', '').replace('>>> ', '').replace('>>>', '').replace('... ',
-		'').replace(wd + os.path_separator, '').replace(vexec_folder,
-		'').replace('\\', '/').trim_right('\n\r')
+		'').replace(wd + os.path_separator, '').replace(vexec_folder, '').replace('\\', '/').trim_right('\n\r')
 	if result != output {
 		file_result := '${file}.result.txt'
 		file_expected := '${file}.expected.txt'
@@ -81,7 +80,7 @@ $diff
 	}
 }
 
-pub fn run_prod_file(wd, vexec, file string) ?string {
+pub fn run_prod_file(wd string, vexec string, file string) ?string {
 	file_expected := '${file}.expected.txt'
 	f_expected_content := os.read_file(file_expected) or {
 		return error('Could not read file $file')