diff --git a/clippy_lints/src/collapsible_if.rs b/clippy_lints/src/collapsible_if.rs
index 83b87dc74b0..85bd419df73 100644
--- a/clippy_lints/src/collapsible_if.rs
+++ b/clippy_lints/src/collapsible_if.rs
@@ -2,7 +2,7 @@
 //!
 //! For example, the lint would catch:
 //!
-//! ```rust
+//! ```rust,ignore
 //! if x {
 //!     if y {
 //!         println!("Hello world");
@@ -28,7 +28,7 @@ use utils::sugg::Sugg;
 /// **Known problems:** None.
 ///
 /// **Example:**
-/// ```rust
+/// ```rust,ignore
 /// if x {
 ///     if y {
 ///         …
@@ -48,7 +48,7 @@ use utils::sugg::Sugg;
 ///
 /// Should be written:
 ///
-/// ```rust
+/// ```rust.ignore
 /// if x && y {
 ///     …
 /// }
@@ -140,7 +140,7 @@ fn check_collapsible_no_if_let(cx: &EarlyContext, expr: &ast::Expr, check: &ast:
     }}
 }
 
-/// If the block contains only one expression, returns it.
+/// If the block contains only one expression, return it.
 fn expr_block(block: &ast::Block) -> Option<&ast::Expr> {
     let mut it = block.stmts.iter();
 
diff --git a/clippy_lints/src/utils/mod.rs b/clippy_lints/src/utils/mod.rs
index e56574c9ba9..f31ce3706eb 100644
--- a/clippy_lints/src/utils/mod.rs
+++ b/clippy_lints/src/utils/mod.rs
@@ -35,23 +35,27 @@ pub type MethodArgs = HirVec<P<Expr>>;
 
 /// Produce a nested chain of if-lets and ifs from the patterns:
 ///
-///     if_let_chain! {[
-///         let Some(y) = x,
-///         y.len() == 2,
-///         let Some(z) = y,
-///     ], {
-///         block
-///     }}
+/// ```rust,ignore
+/// if_let_chain! {[
+///     let Some(y) = x,
+///     y.len() == 2,
+///     let Some(z) = y,
+/// ], {
+///     block
+/// }}
+/// ```
 ///
 /// becomes
 ///
-///     if let Some(y) = x {
-///         if y.len() == 2 {
-///             if let Some(z) = y {
-///                 block
-///             }
+/// ```rust,ignore
+/// if let Some(y) = x {
+///     if y.len() == 2 {
+///         if let Some(z) = y {
+///             block
 ///         }
 ///     }
+/// }
+/// ```
 #[macro_export]
 macro_rules! if_let_chain {
     ([let $pat:pat = $expr:expr, $($tt:tt)+], $block:block) => {
@@ -135,7 +139,7 @@ pub fn in_external_macro<'a, T: LintContext<'a>>(cx: &T, span: Span) -> bool {
 /// Check if a `DefId`'s path matches the given absolute type path usage.
 ///
 /// # Examples
-/// ```
+/// ```rust,ignore
 /// match_def_path(cx, id, &["core", "option", "Option"])
 /// ```
 ///
@@ -229,7 +233,7 @@ pub fn single_segment_path(path: &QPath) -> Option<&PathSegment> {
 /// Match a `Path` against a slice of segment string literals.
 ///
 /// # Examples
-/// ```
+/// ```rust,ignore
 /// match_path(path, &["std", "rt", "begin_unwind"])
 /// ```
 pub fn match_path(path: &QPath, segments: &[&str]) -> bool {
@@ -254,7 +258,7 @@ pub fn match_path_old(path: &Path, segments: &[&str]) -> bool {
 /// Match a `Path` against a slice of segment string literals, e.g.
 ///
 /// # Examples
-/// ```
+/// ```rust,ignore
 /// match_path(path, &["std", "rt", "begin_unwind"])
 /// ```
 pub fn match_path_ast(path: &ast::Path, segments: &[&str]) -> bool {
@@ -371,7 +375,7 @@ pub fn get_item_name(cx: &LateContext, expr: &Expr) -> Option<Name> {
 /// Convert a span to a code snippet if available, otherwise use default.
 ///
 /// # Example
-/// ```
+/// ```rust,ignore
 /// snippet(cx, expr.span, "..")
 /// ```
 pub fn snippet<'a, 'b, T: LintContext<'b>>(cx: &T, span: Span, default: &'a str) -> Cow<'a, str> {
@@ -388,7 +392,7 @@ pub fn snippet_opt<'a, T: LintContext<'a>>(cx: &T, span: Span) -> Option<String>
 /// things which need to be printed as such.
 ///
 /// # Example
-/// ```
+/// ```rust,ignore
 /// snippet(cx, expr.span, "..")
 /// ```
 pub fn snippet_block<'a, 'b, T: LintContext<'b>>(cx: &T, span: Span, default: &'a str) -> Cow<'a, str> {
diff --git a/clippy_lints/src/utils/sugg.rs b/clippy_lints/src/utils/sugg.rs
index f3f0337a017..e4938f1c1ed 100644
--- a/clippy_lints/src/utils/sugg.rs
+++ b/clippy_lints/src/utils/sugg.rs
@@ -398,7 +398,7 @@ pub trait DiagnosticBuilderExt<'a, T: LintContext<'a>> {
     ///
     /// # Example
     ///
-    /// ```rust
+    /// ```rust,ignore
     /// db.suggest_item_with_attr(cx, item, "#[derive(Default)]");
     /// ```
     fn suggest_item_with_attr<D: Display + ?Sized>(&mut self, cx: &T, item: Span, msg: &str, attr: &D);
@@ -409,7 +409,7 @@ pub trait DiagnosticBuilderExt<'a, T: LintContext<'a>> {
     ///
     /// # Example
     ///
-    /// ```rust
+    /// ```rust,ignore
     /// db.suggest_prepend_item(cx, item,
     /// "fn foo() {
     ///     bar();