Fix for AppVeyor config

appveyor.yml

@@ -61,12 +61,12 @@ install:
 
 ## Build Script ##
 
-# 'cargo test' takes care of building for us, so disable Appveyor's build stage. This prevents
-# the "directory does not contain a project or solution file" error.
+# This prevents the "directory does not contain a project or solution file"
+# error.
 build: false
 
-# Uses 'cargo test' to run tests and build. Alternatively, the project may call compiled programs
-#directly or perform other testing commands. Rust will automatically be placed in the PATH
-# environment variable.
+# Uses 'cargo build' to build. AppVeyor cannot run tests on this crate as it
+# redirects the console's output, and its state then cannot be retrieved, let
+# alone modified.
 test_script:
-  - cargo test --verbose %cargoflags%
+  - cargo build --verbose %cargoflags%