Add base float decode tests
diff --git a/test/qcbor_decode_tests.c b/test/qcbor_decode_tests.c
index 0a3fa2a..a14e9d2 100644
--- a/test/qcbor_decode_tests.c
+++ b/test/qcbor_decode_tests.c
@@ -2075,7 +2075,7 @@
 
 
 // have to check float expected only to within an epsilon
-int CHECK_EXPECTED_DOUBLE(double val, double expected) {
+static int CHECK_EXPECTED_DOUBLE(double val, double expected) {
 
    double diff = val - expected;