diff --git a/tools/test_modules/m00121.pm b/tools/test_modules/m00121.pm
index a850ad87d..ebe5b0db8 100644
--- a/tools/test_modules/m00121.pm
+++ b/tools/test_modules/m00121.pm
@@ -17,7 +17,7 @@ sub module_generate_hash
   my $word = shift;
   my $salt = shift;
 
-  my $digest = sha1_hex (lc($salt) . $word);
+  my $digest = sha1_hex (lc ($salt) . $word);
 
   my $hash = sprintf ("%s:%s", $digest, $salt);
 
diff --git a/tools/test_modules/m00122.pm b/tools/test_modules/m00122.pm
index 785247879..41a9b5bf9 100644
--- a/tools/test_modules/m00122.pm
+++ b/tools/test_modules/m00122.pm
@@ -32,7 +32,7 @@ sub module_verify_hash
 
   my ($hash, $word) = split (':', $line);
 
-  my $salt = substr($hash, 0, 8);
+  my $salt = substr ($hash, 0, 8);
 
   return unless defined $hash;
   return unless defined $salt;
diff --git a/tools/test_modules/m00125.pm b/tools/test_modules/m00125.pm
index 764aca3c6..7ab90d728 100644
--- a/tools/test_modules/m00125.pm
+++ b/tools/test_modules/m00125.pm
@@ -34,7 +34,7 @@ sub module_verify_hash
 
   my ($hash, $word) = split (':', $line);
 
-  my $salt = substr($hash, 0, 8);
+  my $salt = substr ($hash, 0, 8);
 
   return unless defined $hash;
   return unless defined $salt;