diff --git a/crates/qbz-audio/src/alsa_direct.rs b/crates/qbz-audio/src/alsa_direct.rs
index 0af1ba4c7..65d0c2f4c 100644
--- a/crates/qbz-audio/src/alsa_direct.rs
+++ b/crates/qbz-audio/src/alsa_direct.rs
@@ -1211,10 +1211,16 @@ mod tests {
         audio.backend_type = Some(AudioBackendType::Alsa);
         audio.output_device = Some("front:CARD=USB,DEV=0".to_string());
         audio.alsa_plugin = Some(AlsaPlugin::Hw);
-        assert!(uses_alsa_direct_route(&audio));
+        assert_eq!(
+            uses_alsa_direct_route(&audio),
+            cfg!(target_os = "linux")
+        );
 
         audio.alsa_plugin = Some(AlsaPlugin::PlugHw);
-        assert!(uses_alsa_direct_route(&audio));
+        assert_eq!(
+            uses_alsa_direct_route(&audio),
+            cfg!(target_os = "linux")
+        );
 
         audio.alsa_plugin = Some(AlsaPlugin::Pcm);
         assert!(!uses_alsa_direct_route(&audio));
diff --git a/crates/qbz-qt/src/output_labels.rs b/crates/qbz-qt/src/output_labels.rs
index 05affb3a5..1ed338677 100644
--- a/crates/qbz-qt/src/output_labels.rs
+++ b/crates/qbz-qt/src/output_labels.rs
@@ -234,14 +234,14 @@ mod tests {
         // hw = the bit-perfect direct path: engine set_volume is a no-op.
         s.alsa_plugin = Some(AlsaPlugin::Hw);
         s.alsa_hardware_volume = false;
-        assert!(volume_locked(&s));
+        assert_eq!(volume_locked(&s), cfg!(target_os = "linux"));
         // ...unless the DAC's own mixer is driven instead.
         s.alsa_hardware_volume = true;
         assert!(!volume_locked(&s));
         // plughw still runs the AlsaDirect engine -> still inert.
         s.alsa_hardware_volume = false;
         s.alsa_plugin = Some(AlsaPlugin::PlugHw);
-        assert!(volume_locked(&s));
+        assert_eq!(volume_locked(&s), cfg!(target_os = "linux"));
         // Pcm opts out of the direct engine (CPAL/rodio) -> software volume.
         s.alsa_plugin = Some(AlsaPlugin::Pcm);
         assert!(!volume_locked(&s));
diff --git a/crates/qbz-qt/src/settings_qt.rs b/crates/qbz-qt/src/settings_qt.rs
index 9360ac531..2f22c5d04 100644
--- a/crates/qbz-qt/src/settings_qt.rs
+++ b/crates/qbz-qt/src/settings_qt.rs
@@ -3586,14 +3586,20 @@ mod local_tab_order_tests {
         audio.backend_type = Some(AudioBackendType::Alsa);
         audio.output_device = Some("front:CARD=USB,DEV=0".to_string());
         audio.alsa_plugin = Some(AlsaPlugin::Hw);
-        assert!(requires_alsa_direct_unity(&audio));
+        assert_eq!(
+            requires_alsa_direct_unity(&audio),
+            cfg!(target_os = "linux")
+        );
 
         audio.alsa_hardware_volume = true;
         assert!(!requires_alsa_direct_unity(&audio));
         audio.alsa_hardware_volume = false;
 
         audio.alsa_plugin = Some(AlsaPlugin::PlugHw);
-        assert!(requires_alsa_direct_unity(&audio));
+        assert_eq!(
+            requires_alsa_direct_unity(&audio),
+            cfg!(target_os = "linux")
+        );
         audio.alsa_plugin = Some(AlsaPlugin::Pcm);
         assert!(!requires_alsa_direct_unity(&audio));