diff --git a/.travis.yml b/.travis.yml
index 9a27b2d..f3c1432 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,5 +5,6 @@ addons:
       - qemu-utils
       - parted
       - jq
+      - libmagic-mgc
 script:
   - ./test.sh
diff --git a/tests/maas.sh b/tests/maas.sh
index 4a2ba53..f0f10cb 100755
--- a/tests/maas.sh
+++ b/tests/maas.sh
@@ -5,7 +5,7 @@ function test_stream()
     local mimetype
     get_streams
     mimetype="$(file -b --mime-type "$streams")"
-    assertEquals "$mimetype" "application/json"
+    assertEquals "application/json" "$mimetype"
     cleanup_temp
 }