diff --git a/test/fuzzing/meson.build b/test/fuzzing/meson.build
index b21655a7e..c941406f4 100644
--- a/test/fuzzing/meson.build
+++ b/test/fuzzing/meson.build
@@ -20,6 +20,7 @@ endforeach
 
 env = environment()
 env.set('srcdir', meson.current_source_dir())
+env.set('HB_TEST_SUBSET_FUZZER_TIMEOUT', '24')
 
 test('shape_fuzzer', find_program('run-shape-fuzzer-tests.py'),
   args: [
@@ -36,7 +37,6 @@ test('subset_fuzzer', find_program('run-subset-fuzzer-tests.py'),
   # as the tests are ran concurrently let's raise acceptable time here
   # ideally better to break and let meson handles them in parallel
   timeout: 120,
-  is_parallel: false,
   workdir: join_paths(meson.current_build_dir(), '..', '..'),
   env: env)
 
diff --git a/test/subset/meson.build b/test/subset/meson.build
index 88f4f6b5e..2f3573b13 100644
--- a/test/subset/meson.build
+++ b/test/subset/meson.build
@@ -37,8 +37,7 @@ foreach t : tests
     ],
     # as the tests are ran concurrently let's raise acceptable time here
     # ideally better to break and let meson handles them in parallel
-    timeout: 200,
-    is_parallel: false,
+    timeout: 360,
     workdir: join_paths(meson.current_build_dir(), '..', '..'),
   )
 endforeach