diff --git a/tests/test_util/executable_path.cpp b/tests/test_util/executable_path.cpp
index 082f5414..365f7367 100644
--- a/tests/test_util/executable_path.cpp
+++ b/tests/test_util/executable_path.cpp
@@ -65,8 +65,8 @@ namespace test_util {
 std::string get_executable_path() {
     std::array<char, PATH_MAX> buffer{};
     const ssize_t size = ::readlink("/proc/self/exe", buffer.data(), buffer.size());
-    if (size != -1) {
-        return {buffer.data(), size};
+    if (size >= 1) {
+        return {buffer.data(), size_t(size)};
     }
     throw std::system_error(std::make_error_code(std::errc::no_such_file_or_directory),
                             "Could not get executable path");