diff --git a/tests/passwdgen_test.cpp b/tests/passwdgen_test.cpp
index 7f5f645..19006cb 100644
--- a/tests/passwdgen_test.cpp
+++ b/tests/passwdgen_test.cpp
@@ -5,9 +5,7 @@
 #include <cassert>
 
 void test_random_string_length() {
-    const int lengths[] = {0, 1, 10, 32, 100};
-
-    for (auto length : lengths) {
+    for (const int lengths[] = {0, 1, 10, 32, 100}; const auto length : lengths) {
         std::string result = random_string(length, false);
         assert(result.length() == length);
 
@@ -18,7 +16,7 @@ void test_random_string_length() {
 }
 
 void test_alphanumeric_only() {
-    std::regex alphanumeric_only("^[a-zA-Z0-9]*$");
+    const std::regex alphanumeric_only("^[a-zA-Z0-9]*$");
 
     for (int i = 0; i < 10; i++) {
         std::string result = random_string(20, false);