diff --git a/test/ResultTest.cpp b/test/ResultTest.cpp
index 43e9f35..e84d093 100644
--- a/test/ResultTest.cpp
+++ b/test/ResultTest.cpp
@@ -25,7 +25,12 @@ utils::result<float, math_error>plus(int x, int y) {
 }
 
 utils::result<float, std::string>error_to_string(math_error err) {
-  return utils::error(std::string("error"));
+  switch (err) {
+    case math_error::DIVISION_BY_ZERO:
+      return utils::error(std::string("division by zero error"));
+    default:
+      return utils::error(std::string("unknown error"));
+  }
 }
 
 }
@@ -76,7 +81,7 @@ TEST_CASE("Result tests", "[result]") {
   REQUIRE(!res2);
   REQUIRE(!res2.is_ok());
   REQUIRE(res2.is_error());
-  REQUIRE((res2.err() == "error"));
+  REQUIRE((res2.err() == "division by zero error"));
 
   res = test::divide(4, 2)
     .and_then([](const auto &val) { return test::multiply(val, 5); })