diff --git a/__tests__/mode.test.scss b/__tests__/mode.test.scss
index 2c0d1cae..a02856e1 100644
--- a/__tests__/mode.test.scss
+++ b/__tests__/mode.test.scss
@@ -27,6 +27,36 @@
       }
     }
   }
+
+  @include test("support pref") {
+    @include mode.SUPPORT_PREF;
+
+    @include assert {
+      @include output {
+        @if mode.isMediaPref() {
+          @include example;
+        }
+      }
+      @include expect {
+        // IGNORE
+      }
+    }
+  }
+
+  @include test("media pref") {
+    @include mode.MEDIA_PREF;
+
+    @include assert {
+      @include output {
+        @if mode.isMediaPref() {
+          @include example;
+        }
+      }
+      @include expect {
+        // IGNORE
+      }
+    }
+  }
 }
 
 @include test-module("STANDARD Mode [mix]") {
@@ -54,4 +84,34 @@
       }
     }
   }
+
+  @include test("support pref") {
+    @include mode.SUPPORT_PREF;
+
+    @include assert {
+      @include output {
+        @if mode.isMediaPref() {
+          @include example;
+        }
+      }
+      @include expect {
+        // IGNORE
+      }
+    }
+  }
+
+  @include test("media pref") {
+    @include mode.MEDIA_PREF;
+
+    @include assert {
+      @include output {
+        @if mode.isMediaPref() {
+          @include example;
+        }
+      }
+      @include expect {
+        @include example;
+      }
+    }
+  }
 }