diff --git a/test/unit/error.cpp b/test/unit/error.cpp
index 4ac65dac..24f69159 100644
--- a/test/unit/error.cpp
+++ b/test/unit/error.cpp
@@ -11,33 +11,59 @@
 using namespace testing;
 using boost::mysql::errc;
 using boost::mysql::detail::error_to_string;
+using boost::mysql::error_info;
 
-TEST(errc, ErrorToString_Ok_ReturnsOk)
+// error_to_string
+TEST(ErrcEnum, ErrorToString_Ok_ReturnsOk)
 {
     EXPECT_STREQ(error_to_string(errc::ok), "no error");
 }
 
-TEST(errc, ErrorToString_ClientError_ReturnsDescription)
+TEST(ErrcEnum, ErrorToString_ClientError_ReturnsDescription)
 {
     EXPECT_STREQ(error_to_string(errc::sequence_number_mismatch), "Mismatched sequence numbers");
 }
 
-TEST(errc, ErrorToString_ServerError_ReturnsEnumName)
+TEST(ErrcEnum, ErrorToString_ServerError_ReturnsEnumName)
 {
     EXPECT_STREQ(error_to_string(errc::bad_db_error), "bad_db_error");
 }
 
-TEST(errc, ErrorToString_UnknownErrorOutOfRange_ReturnsUnknown)
+TEST(ErrcEnum, ErrorToString_UnknownErrorOutOfRange_ReturnsUnknown)
 {
     EXPECT_STREQ(error_to_string(static_cast<errc>(0xfffefdfc)), "<unknown error>");
 }
 
-TEST(errc, ErrorToString_UnknownErrorServerRange_ReturnsUnknown)
+TEST(ErrcEnum, ErrorToString_UnknownErrorServerRange_ReturnsUnknown)
 {
     EXPECT_STREQ(error_to_string(static_cast<errc>(1009)), "<unknown error>");
 }
 
-TEST(errc, ErrorToString_UnknownErrorBetweenServerAndClientRange_ReturnsUnknown)
+TEST(ErrcEnum, ErrorToString_UnknownErrorBetweenServerAndClientRange_ReturnsUnknown)
 {
     EXPECT_STREQ(error_to_string(static_cast<errc>(5000)), "<unknown error>");
 }
+
+// errro_info
+TEST(ErrorInfo, OperatorEquals_Trivial_ComparesMessages)
+{
+    EXPECT_TRUE(error_info() == error_info());
+    EXPECT_TRUE(error_info("abc") == error_info("abc"));
+    EXPECT_FALSE(error_info() == error_info("abc"));
+    EXPECT_FALSE(error_info("def") == error_info("abc"));
+}
+
+TEST(ErrorInfo, OperatorNotEquals_Trivial_ComparesMessages)
+{
+    EXPECT_FALSE(error_info() != error_info());
+    EXPECT_FALSE(error_info("abc") != error_info("abc"));
+    EXPECT_TRUE(error_info() != error_info("abc"));
+    EXPECT_TRUE(error_info("def") != error_info("abc"));
+}
+
+TEST(ErrorInfo, OperatorStream_Trivial_StreamsMessage)
+{
+    std::ostringstream ss;
+    ss << error_info("abc");
+    EXPECT_EQ(ss.str(), "abc");
+}