diff --git a/tests/assert.hpp b/tests/assert.hpp
new file mode 100644
index 0000000..e6ede15
--- /dev/null
+++ b/tests/assert.hpp
@@ -0,0 +1,8 @@
+#ifndef TESTS_ASSERT_HPP
+#define TESTS_ASSERT_HPP
+
+#include <cstdlib>
+
+#define ASSERT(e) ((void)((e) ? ((void)0) : ((void)fprintf(stderr, "Assertion failed: (%s), function %s, file %s, line %u.\n", #e, __func__, __FILE__, __LINE__), abort())))
+
+#endif /* TESTS_ASSERT_HPP */
diff --git a/tests/check.hpp b/tests/check.hpp
deleted file mode 100644
index bfead5f..0000000
--- a/tests/check.hpp
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef CHECK_HPP
-#define CHECK_HPP
-
-#include <cstdlib>
-
-#define ASSERT(cond) if (!(cond)) { std::abort(); }
-
-#endif /* CHECK_HPP */
diff --git a/tests/crypto_test.cpp b/tests/crypto_test.cpp
index ed66001..1456cc7 100644
--- a/tests/crypto_test.cpp
+++ b/tests/crypto_test.cpp
@@ -1,7 +1,6 @@
-#include <vector>
-
-#include "check.hpp"
+#include "assert.hpp"
 #include "crypto.hpp"
+#include <vector>
 
 using namespace std;
 using namespace SimpleWeb;
diff --git a/tests/io_test.cpp b/tests/io_test.cpp
index 6c1b949..d15270b 100644
--- a/tests/io_test.cpp
+++ b/tests/io_test.cpp
@@ -1,6 +1,6 @@
+#include "assert.hpp"
 #include "client_http.hpp"
 #include "server_http.hpp"
-#include "check.hpp"
 
 using namespace std;
 
diff --git a/tests/parse_test.cpp b/tests/parse_test.cpp
index 05a6138..c521b38 100644
--- a/tests/parse_test.cpp
+++ b/tests/parse_test.cpp
@@ -1,6 +1,6 @@
+#include "assert.hpp"
 #include "client_http.hpp"
 #include "server_http.hpp"
-#include "check.hpp"
 #include <iostream>
 
 using namespace std;
diff --git a/tests/status_code_test.cpp b/tests/status_code_test.cpp
index f9b623d..679e504 100644
--- a/tests/status_code_test.cpp
+++ b/tests/status_code_test.cpp
@@ -1,5 +1,5 @@
+#include "assert.hpp"
 #include "status_code.hpp"
-#include "check.hpp"
 
 using namespace SimpleWeb;