diff --git a/Library/Homebrew/test/.codecov.yml b/Library/Homebrew/test/.codecov.yml
index 7ab7a77c6f..9d3951d601 100644
--- a/Library/Homebrew/test/.codecov.yml
+++ b/Library/Homebrew/test/.codecov.yml
@@ -2,7 +2,9 @@ comment: off
 fixes:
   - "::Library/Homebrew/"
 coverage:
+  round: nearest
+  precision: 2
   status:
     project:
-    default:
-        threshold: 0.1
+      default:
+        threshold: 0.05%
diff --git a/Library/Homebrew/unpack_strategy/cab.rb b/Library/Homebrew/unpack_strategy/cab.rb
index 1daf219f4a..acc3b1ec32 100644
--- a/Library/Homebrew/unpack_strategy/cab.rb
+++ b/Library/Homebrew/unpack_strategy/cab.rb
@@ -3,7 +3,7 @@ module UnpackStrategy
     include UnpackStrategy
 
     def self.can_extract?(path:, magic_number:)
-      magic_number.match?(/\A(MSCF|MZ)/n)
+      magic_number.match?(/\AMSCF/n)
     end
 
     def extract_to_dir(unpack_dir, basename:, verbose:)