diff --git a/tests/unix/extra_coverage.py.exp b/tests/unix/extra_coverage.py.exp
index ac59971a50..32117aba44 100644
--- a/tests/unix/extra_coverage.py.exp
+++ b/tests/unix/extra_coverage.py.exp
@@ -43,6 +43,9 @@ Warning: test
 ?
 +1e+00
 +1e+00
+# binary
+122
+456
 0123456789 b'0123456789'
 7300
 7300
diff --git a/unix/coverage.c b/unix/coverage.c
index 5b0c8d7a06..ca236c4303 100644
--- a/unix/coverage.c
+++ b/unix/coverage.c
@@ -10,6 +10,7 @@
 #include "py/emit.h"
 #include "py/formatfloat.h"
 #include "py/stream.h"
+#include "py/binary.h"
 
 #if defined(MICROPY_UNIX_COVERAGE)
 
@@ -278,6 +279,19 @@ STATIC mp_obj_t extra_coverage(void) {
         mp_printf(&mp_plat_print, "%s\n", buf2);
     }
 
+    // binary
+    {
+        mp_printf(&mp_plat_print, "# binary\n");
+
+        // call function with float and double typecodes
+        float far[1];
+        double dar[1];
+        mp_binary_set_val_array_from_int('f', far, 0, 123);
+        mp_printf(&mp_plat_print, "%.0f\n", (double)far[0]);
+        mp_binary_set_val_array_from_int('d', dar, 0, 456);
+        mp_printf(&mp_plat_print, "%.0lf\n", dar[0]);
+    }
+
     mp_obj_streamtest_t *s = m_new_obj(mp_obj_streamtest_t);
     s->base.type = &mp_type_stest_fileio;
     s->buf = NULL;