diff --git a/src/lib.rs b/src/lib.rs
index ccf182b..b4760a4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -32,11 +32,9 @@
 //!     a: u32
 //! }
 //!
-//! fn main() {
-//!     assert_eq!(offset_of!(HelpMeIAmTrappedInAStructFactory, a), 15);
-//!     assert_eq!(span_of!(HelpMeIAmTrappedInAStructFactory, a), 15..19);
-//!     assert_eq!(span_of!(HelpMeIAmTrappedInAStructFactory, help_me_before_they_ .. a), 0..15);
-//! }
+//! assert_eq!(offset_of!(HelpMeIAmTrappedInAStructFactory, a), 15);
+//! assert_eq!(span_of!(HelpMeIAmTrappedInAStructFactory, a), 15..19);
+//! assert_eq!(span_of!(HelpMeIAmTrappedInAStructFactory, help_me_before_they_ .. a), 0..15);
 //! ```
 //!
 //! This functionality can be useful, for example, for checksum calculations:
diff --git a/src/offset_of.rs b/src/offset_of.rs
index df1c84a..f5a7ba6 100644
--- a/src/offset_of.rs
+++ b/src/offset_of.rs
@@ -103,10 +103,8 @@ macro_rules! _memoffset__offset_of_impl {
 ///     c: [u8; 5]
 /// }
 ///
-/// fn main() {
-///     assert_eq!(offset_of!(Foo, a), 0);
-///     assert_eq!(offset_of!(Foo, b), 4);
-/// }
+/// assert_eq!(offset_of!(Foo, a), 0);
+/// assert_eq!(offset_of!(Foo, b), 4);
 /// ```
 ///
 /// ## Notes
@@ -133,9 +131,7 @@ macro_rules! offset_of {
 /// ```
 /// use memoffset::offset_of_tuple;
 ///
-/// fn main() {
-///     assert!(offset_of_tuple!((u8, u32), 1) >= 0, "Tuples do not have a defined layout");
-/// }
+/// assert!(offset_of_tuple!((u8, u32), 1) >= 0, "Tuples do not have a defined layout");
 /// ```
 #[cfg(tuple_ty)]
 #[macro_export(local_inner_macros)]
@@ -186,9 +182,7 @@ macro_rules! _memoffset__offset_of_union_impl {
 ///     foo64: i64,
 /// }
 ///
-/// fn main() {
-///     assert!(offset_of_union!(Foo, foo64) == 0);
-/// }
+/// assert!(offset_of_union!(Foo, foo64) == 0);
 /// ```
 ///
 /// ## Note
diff --git a/src/span_of.rs b/src/span_of.rs
index 0ef9863..5543b92 100644
--- a/src/span_of.rs
+++ b/src/span_of.rs
@@ -81,15 +81,13 @@ macro_rules! _memoffset__compile_error {
 ///     egg: [[u8; 4]; 4]
 /// }
 ///
-/// fn main() {
-///     assert_eq!(0..84,  span_of!(Blarg, ..));
-///     assert_eq!(0..8,   span_of!(Blarg, .. y));
-///     assert_eq!(0..64,  span_of!(Blarg, ..= y));
-///     assert_eq!(0..8,   span_of!(Blarg, x));
-///     assert_eq!(8..84,  span_of!(Blarg, y ..));
-///     assert_eq!(0..8,   span_of!(Blarg, x .. y));
-///     assert_eq!(0..64,  span_of!(Blarg, x ..= y));
-/// }
+/// assert_eq!(0..84,  span_of!(Blarg, ..));
+/// assert_eq!(0..8,   span_of!(Blarg, .. y));
+/// assert_eq!(0..64,  span_of!(Blarg, ..= y));
+/// assert_eq!(0..8,   span_of!(Blarg, x));
+/// assert_eq!(8..84,  span_of!(Blarg, y ..));
+/// assert_eq!(0..8,   span_of!(Blarg, x .. y));
+/// assert_eq!(0..64,  span_of!(Blarg, x ..= y));
 /// ```
 #[macro_export(local_inner_macros)]
 macro_rules! span_of {