diff --git a/tests/grib_lam_bf.cc b/tests/grib_lam_bf.cc
index c7170a192..7a575e68c 100644
--- a/tests/grib_lam_bf.cc
+++ b/tests/grib_lam_bf.cc
@@ -860,7 +860,7 @@ int main(int argc, char* argv[])
                 geometry_len = 128;
                 GRIB_CHECK(grib_get_string(h, "gridType", geometry, &geometry_len), 0);
                 if (strcmp(geometry, grids[igrid])) {
-                    printf("Geometry is incorrect\n");
+                    fprintf(stderr, "Geometry is incorrect\n");
                     return 1;
                 }
 
diff --git a/tests/unit_tests.cc b/tests/unit_tests.cc
index 688e4f104..eedafca1b 100644
--- a/tests/unit_tests.cc
+++ b/tests/unit_tests.cc
@@ -225,7 +225,6 @@ static void test_assertion_catching()
 
     char empty[] = "";
     char** list  = NULL;
-    int i        = 0;
     Assert(assertion_caught == 0);
     codes_set_codes_assertion_failed_proc(&my_assertion_proc);
 
@@ -265,6 +264,16 @@ static void test_logging_proc()
     Assert(logging_caught == 0);
 }
 
+static void my_print_proc(const grib_context* c, void* descriptor, const char* mesg)
+{
+}
+static void test_print_proc()
+{
+    grib_context* context = grib_context_get_default();
+    grib_context_set_print_proc(context, my_print_proc);
+    grib_context_set_print_proc(context, NULL);
+}
+
 static void test_concept_condition_strings()
 {
     printf("Running %s ...\n", __func__);
@@ -788,6 +797,7 @@ int main(int argc, char** argv)
     test_scale_factor_scaled_values();
     test_dates();
     test_logging_proc();
+    test_print_proc();
     test_grib_binary_search();
     test_parse_keyval_string();