diff --git a/slsSupportLib/tests/test-ToString.cpp b/slsSupportLib/tests/test-ToString.cpp
index 1fcddb2da..41b510455 100644
--- a/slsSupportLib/tests/test-ToString.cpp
+++ b/slsSupportLib/tests/test-ToString.cpp
@@ -330,4 +330,22 @@ TEST_CASE("streamingInterface") {
     REQUIRE(ToString(sls::defs::streamingInterface::LOW_LATENCY_LINK) == "lll");
     REQUIRE(ToString(sls::defs::streamingInterface::LOW_LATENCY_LINK |
                      sls::defs::streamingInterface::ETHERNET_10GB) == "lll, 10gbe");
+}
+
+
+//Speed level 
+TEST_CASE("speedLevel to string"){
+    REQUIRE(ToString(sls::defs::speedLevel::FULL_SPEED) == "full_speed");
+    REQUIRE(ToString(sls::defs::speedLevel::HALF_SPEED) == "half_speed");
+    REQUIRE(ToString(sls::defs::speedLevel::QUARTER_SPEED) == "quarter_speed");
+    REQUIRE(ToString(sls::defs::speedLevel::G_108MHZ) == "108");
+    REQUIRE(ToString(sls::defs::speedLevel::G_144MHZ) == "144");
+}
+
+TEST_CASE("string to speedLevel"){
+    REQUIRE(StringTo<sls::defs::speedLevel>("full_speed") == sls::defs::speedLevel::FULL_SPEED);
+    REQUIRE(StringTo<sls::defs::speedLevel>("half_speed") == sls::defs::speedLevel::HALF_SPEED);
+    REQUIRE(StringTo<sls::defs::speedLevel>("quarter_speed") == sls::defs::speedLevel::QUARTER_SPEED);
+    REQUIRE(StringTo<sls::defs::speedLevel>("108") == sls::defs::speedLevel::G_108MHZ);
+    REQUIRE(StringTo<sls::defs::speedLevel>("144") == sls::defs::speedLevel::G_144MHZ);
 }
\ No newline at end of file