diff --git a/client/src/input/microphone/tests/mod.rs b/client/src/input/microphone/tests/mod.rs
index 1fff654..aa79c82 100644
--- a/client/src/input/microphone/tests/mod.rs
+++ b/client/src/input/microphone/tests/mod.rs
@@ -1,8 +1,10 @@
 use super::{
-    MIC_CHANNELS, MIC_SAMPLE_BYTES, MIC_SAMPLE_RATE, buffer_duration_us, mic_packet_target_bytes,
-    pcm_payload_duration_us, split_audio_sample,
+    MIC_CHANNELS, MIC_SAMPLE_BYTES, MIC_SAMPLE_RATE, bool_env_enabled, buffer_duration_us,
+    explicit_media_sources_required, mic_noise_suppression_from_env, mic_noise_suppression_level,
+    mic_packet_target_bytes, pcm_payload_duration_us, split_audio_sample,
 };
 use gstreamer as gst;
+use serial_test::serial;
 
 fn buffer_with_duration(size: usize, duration: Option<gst::ClockTime>) -> gst::Buffer {
     gst::init().ok();
@@ -77,3 +79,45 @@ fn trailing_microphone_packet_keeps_remaining_bytes() {
     assert_eq!(packets[2].data.len(), 960);
     assert_eq!(packets[2].pts, 45_000);
 }
+
+#[test]
+#[serial]
+fn microphone_noise_suppression_level_accepts_named_presets() {
+    let cases = [
+        ("low", "low"),
+        ("medium", "moderate"),
+        ("moderate", "moderate"),
+        ("high", "high"),
+        ("very_high", "very-high"),
+        ("aggressive", "very-high"),
+        ("unknown", "very-high"),
+    ];
+
+    for (raw, expected) in cases {
+        temp_env::with_var("LESAVKA_MIC_NOISE_SUPPRESSION_LEVEL", Some(raw), || {
+            assert_eq!(mic_noise_suppression_level(), expected);
+        });
+    }
+}
+
+#[test]
+#[serial]
+fn boolean_microphone_flags_accept_plain_english_true_values() {
+    for raw in ["1", "true", "yes", "on"] {
+        temp_env::with_vars(
+            [
+                ("LESAVKA_REQUIRE_EXPLICIT_MEDIA_SOURCES", Some(raw)),
+                ("LESAVKA_MIC_NOISE_SUPPRESSION", Some(raw)),
+            ],
+            || {
+                assert!(explicit_media_sources_required());
+                assert!(mic_noise_suppression_from_env());
+                assert!(bool_env_enabled("LESAVKA_MIC_NOISE_SUPPRESSION"));
+            },
+        );
+    }
+
+    temp_env::with_var("LESAVKA_MIC_NOISE_SUPPRESSION", Some("false"), || {
+        assert!(!mic_noise_suppression_from_env());
+    });
+}