diff --git a/tests/string_test.cpp b/tests/string_test.cpp
index 4f94e08..ead165c 100644
--- a/tests/string_test.cpp
+++ b/tests/string_test.cpp
@@ -255,6 +255,7 @@ TEST_CASE("toString double", "")
 	REQUIRE(testToString(0.000000000123123,       "1.23123e-10") );
 	REQUIRE(testToString(0.0000000001,            "1e-10") );
 	REQUIRE(testToString(-270.000000,             "-270.0") );
+	REQUIRE(testToString(2.225073858507201e-308,  "2.225073858507201e-308") );
 }
 
 static bool testFromString(double _value, const char* _input)
@@ -303,6 +304,7 @@ TEST_CASE("fromString double", "")
 	REQUIRE(testFromString(0.000000000123123,       "1.23123e-10") );
 	REQUIRE(testFromString(0.0000000001,            "1e-10") );
 	REQUIRE(testFromString(-270.000000,             "-270.0") );
+	REQUIRE(testFromString(2.2250738585072011e-308, "2.2250738585072011e-308") );
 }
 
 static bool testFromString(int32_t _value, const char* _input)