diff --git a/test/fixtures/content-types/basic-merged.xml b/test/fixtures/content-types/basic-merged.xml
index 7f7b7cb4..c54b251a 100644
--- a/test/fixtures/content-types/basic-merged.xml
+++ b/test/fixtures/content-types/basic-merged.xml
@@ -5,6 +5,8 @@
   <Default Extension="exe" ContentType="application/octet" />
   <Default Extension="psmdcp" ContentType="application/vnd.openxmlformats-package.core-properties+xml" />
   <Default Extension="diff" ContentType="application/octet" />
+  <Default Extension="bsdiff" ContentType="application/octet" />
   <Default Extension="dll" ContentType="application/octet" />
+  <Default Extension="ico" ContentType="application/octet" />
   <Default Extension="shasum" ContentType="text/plain" />
 </Types>
\ No newline at end of file
diff --git a/test/fixtures/content-types/complex-merged.xml b/test/fixtures/content-types/complex-merged.xml
index b7e8a3f6..55038fd0 100644
--- a/test/fixtures/content-types/complex-merged.xml
+++ b/test/fixtures/content-types/complex-merged.xml
@@ -38,6 +38,7 @@
   <Default ContentType="application/octet" Extension="pak"/>
   <Default ContentType="application/octet" Extension="exe"/>
   <Default ContentType="application/octet" Extension="diff"/>
+  <Default ContentType="application/octet" Extension="bsdiff"/>
   <Default ContentType="text/plain" Extension="shasum"/>
   <Default ContentType="application/vnd.openxmlformats-package.core-properties+xml" Extension="psmdcp"/>
   <Override ContentType="application/octet" PartName="/Content/frontend/js/library/bootstrap/CNAME"/>