diff --git a/src/book/mod.rs b/src/book/mod.rs
index 8a7a93f4..d1ed19c4 100644
--- a/src/book/mod.rs
+++ b/src/book/mod.rs
@@ -213,12 +213,13 @@ impl MDBook {
             .flat_map(|x| vec![x.0, x.1])
             .collect();
 
-        let temp_dir = TempFileBuilder::new().prefix("mdbook").tempdir()?;
+        let temp_dir = TempFileBuilder::new().prefix("mdbook-").tempdir()?;
 
         let preprocess_context = PreprocessorContext::new(self.root.clone(), self.config.clone());
 
         LinkPreprocessor::new().run(&preprocess_context, &mut self.book)?;
-        IndexPreprocessor::new().run(&preprocess_context, &mut self.book)?;
+        // Index Preprocessor is disabled so that chapter paths continue to point to the
+        // actual markdown files.
 
         for item in self.iter() {
             if let BookItem::Chapter(ref ch) = *item {
diff --git a/tests/dummy_book/mod.rs b/tests/dummy_book/mod.rs
index 4c904132..4fe24455 100644
--- a/tests/dummy_book/mod.rs
+++ b/tests/dummy_book/mod.rs
@@ -47,7 +47,7 @@ impl DummyBook {
     /// Write a book to a temporary directory using the provided settings.
     pub fn build(&self) -> Result<TempDir> {
         let temp = TempFileBuilder::new()
-            .prefix("dummy_book")
+            .prefix("dummy_book-")
             .tempdir()
             .chain_err(|| "Unable to create temp directory")?;
 
diff --git a/tests/dummy_book/src/SUMMARY.md b/tests/dummy_book/src/SUMMARY.md
index 6a0d0582..0536e5c2 100644
--- a/tests/dummy_book/src/SUMMARY.md
+++ b/tests/dummy_book/src/SUMMARY.md
@@ -1,6 +1,6 @@
 # Summary
 
-[dummy_book](README.md)
+[Dummy Book](README.md)
 [Introduction](intro.md)
 
 - [First Chapter](first/index.md)
diff --git a/tests/testing.rs b/tests/testing.rs
index 2a32dacc..48e02892 100644
--- a/tests/testing.rs
+++ b/tests/testing.rs
@@ -23,7 +23,7 @@ fn mdbook_can_correctly_test_a_passing_book() {
 #[test]
 fn mdbook_detects_book_with_failing_tests() {
     let temp = DummyBook::new().with_passing_test(false).build().unwrap();
-    let mut md: MDBook = MDBook::load(temp.path()).unwrap();
+    let mut md = MDBook::load(temp.path()).unwrap();
 
     assert!(md.test(vec![]).is_err());
 }