diff --git a/src/backends/tosaReference/test/TosaRefEndToEndTests.cpp b/src/backends/tosaReference/test/TosaRefEndToEndTests.cpp
index 63fa69d..7a3edaf 100644
--- a/src/backends/tosaReference/test/TosaRefEndToEndTests.cpp
+++ b/src/backends/tosaReference/test/TosaRefEndToEndTests.cpp
@@ -25,7 +25,7 @@
 
 TEST_SUITE("TosaRefEndToEnd")
 {
-std::vector<BackendId> tosaDefaultBackends = { "TosaRef" };
+static std::vector<BackendId> tosaDefaultBackends = { "TosaRef" };
 
 // Addition
 TEST_CASE("TosaRefAdditionEndtoEndTestFloat32")