diff --git a/test/api/hb-subset-test.h b/test/api/hb-subset-test.h
index 8f67a3c75..882e51dfd 100644
--- a/test/api/hb-subset-test.h
+++ b/test/api/hb-subset-test.h
@@ -87,7 +87,6 @@ hb_subset_test_check (hb_face_t *expected,
   hb_blob_t *expected_blob, *actual_blob;
   expected_blob = hb_face_reference_table (expected, table);
   actual_blob = hb_face_reference_table (actual, table);
-  fprintf(stderr, "comparing %c%c%c%c, expected %d bytes, actual %d bytes\n", HB_UNTAG(table), hb_blob_get_length(expected_blob), hb_blob_get_length (actual_blob));
 
   if (hb_blob_get_length (expected_blob) != 0 ||
       hb_blob_get_length (actual_blob) != 0)
diff --git a/test/api/hb-test.h b/test/api/hb-test.h
index 9e50eafc8..73232c704 100644
--- a/test/api/hb-test.h
+++ b/test/api/hb-test.h
@@ -166,7 +166,6 @@ static inline void hb_test_assert_blobs_equal (hb_blob_t *expected_blob, hb_blob
       int expected = *(raw_expected + i);
       int actual = *(raw_actual + i);
       if (expected != actual) fprintf(stderr, "+%u %02x != %02x\n", i, expected, actual);
-      else fprintf(stderr, "+%u %02x\n", i, expected);
     }
   }
   g_assert_cmpint(0, ==, memcmp(raw_expected, raw_actual, expected_length));
diff --git a/test/api/meson.build b/test/api/meson.build
index 9881796dc..089b25e04 100644
--- a/test/api/meson.build
+++ b/test/api/meson.build
@@ -117,9 +117,12 @@ foreach source : tests
   endif
 
   test(test_name, executable(test_name, source,
-    cpp_args:  cpp_args,
-    include_directories: [incconfig],
-    dependencies: deps,
-    install: false,
-  ), env: env, suite: suite)
+      cpp_args:  cpp_args,
+      include_directories: [incconfig],
+      dependencies: deps,
+      install: false,
+    ),
+    protocol: 'tap',
+    env: env,
+    suite: suite)
 endforeach
diff --git a/test/api/test-set.c b/test/api/test-set.c
index 6ad11d331..1f1402142 100644
--- a/test/api/test-set.c
+++ b/test/api/test-set.c
@@ -1018,18 +1018,19 @@ check_set_operations(hb_bool_t a_has_x,
     break;
   }
 
-  printf ("%s%s%s%s %-9s %s%s%s%s == %s  [%s]\n",
-          a_inverted ? "i" : " ",
-          a_has_page ? "p" : " ",
-          a_is_null ? "n" : " ",
-          a_has_x ? "{13}" : "{}  ",
-          op_name,
-          b_inverted ? "i" : " ",
-          b_has_page ? "p" : " ",
-          b_is_null ? "n" : " ",
-          b_has_x ? "{13}" : "{}  ",
-          should_have_x ? "{13}" : "{}  ",
-          has_expected ? "succeeded" : "failed");
+  if (FALSE)
+    printf ("%s%s%s%s %-9s %s%s%s%s == %s  [%s]\n",
+	    a_inverted ? "i" : " ",
+	    a_has_page ? "p" : " ",
+	    a_is_null ? "n" : " ",
+	    a_has_x ? "{13}" : "{}  ",
+	    op_name,
+	    b_inverted ? "i" : " ",
+	    b_has_page ? "p" : " ",
+	    b_is_null ? "n" : " ",
+	    b_has_x ? "{13}" : "{}  ",
+	    should_have_x ? "{13}" : "{}  ",
+	    has_expected ? "succeeded" : "failed");
 
   hb_set_destroy (a);
   hb_set_destroy (b);
diff --git a/test/api/test-subset-nameids.c b/test/api/test-subset-nameids.c
index 6d4f81c5c..7fd4f0fd3 100644
--- a/test/api/test-subset-nameids.c
+++ b/test/api/test-subset-nameids.c
@@ -80,7 +80,7 @@ test_subset_name_overrides (void)
   char str6[] = "Roboto-Bold";
   char str12[] = "Non ascii test Ü";
   char str16[] = "Roboto-test-inserting";
- 
+
   hb_set_t *name_ids = hb_set_create();
   hb_face_t *face_subset;
   hb_set_add_range (name_ids, 0, 13);
diff --git a/test/api/test-subset-repacker.c b/test/api/test-subset-repacker.c
index 6eeae4ed2..8f478fa22 100644
--- a/test/api/test-subset-repacker.c
+++ b/test/api/test-subset-repacker.c
@@ -187,7 +187,6 @@ test_hb_repack_with_cy_struct (void)
 
   hb_face_t *face_expected = hb_test_open_font_file ("fonts/repacker_expected.otf");
   hb_blob_t *expected_blob = hb_face_reference_table (face_expected, HB_TAG ('G','S','U','B'));
-  fprintf(stderr, "expected %d bytes, actual %d bytes\n", hb_blob_get_length(expected_blob), hb_blob_get_length (result));
 
   if (hb_blob_get_length (expected_blob) != 0 ||
       hb_blob_get_length (result) != 0)