diff --git a/src/database.rs b/src/database.rs
index 0a97117..c2259ea 100644
--- a/src/database.rs
+++ b/src/database.rs
@@ -113,3 +113,23 @@ extern fn execute_callback(callback: *mut c_void, count: c_int, values: *mut *mu
         if callback(pairs) { 0 } else { 1 }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::Database;
+    use tests::setup;
+
+    macro_rules! ok(
+        ($result:expr) => ($result.unwrap());
+    );
+
+    #[test]
+    fn execute() {
+        let (path, _directory) = setup();
+        let database = ok!(Database::open(&path));
+        match database.execute(":)", None) {
+            Err(error) => assert_eq!(error.message, Some(String::from(r#"unrecognized token: ":""#))),
+            _ => assert!(false),
+        }
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index cc308e6..92d2eb2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -3,6 +3,9 @@
 extern crate libc;
 extern crate sqlite3_sys as raw;
 
+#[cfg(test)]
+extern crate temporary;
+
 macro_rules! raise(
     ($message:expr) => (return Err(::Error::from($message)));
 );
@@ -68,3 +71,18 @@ pub use statement::{Statement, Binding, Value};
 pub fn open(path: &std::path::Path) -> Result<Database> {
     Database::open(path)
 }
+
+#[cfg(test)]
+mod tests {
+    use std::path::PathBuf;
+    use temporary::Directory;
+
+    macro_rules! ok(
+        ($result:expr) => ($result.unwrap());
+    );
+
+    pub fn setup() -> (PathBuf, Directory) {
+        let directory = ok!(Directory::new("sqlite"));
+        (directory.path().join("database.sqlite3"), directory)
+    }
+}
diff --git a/tests/lib.rs b/tests/lib.rs
index 684f557..0a7d9a7 100644
--- a/tests/lib.rs
+++ b/tests/lib.rs
@@ -55,16 +55,6 @@ fn workflow() {
     }
 }
 
-#[test]
-fn failure() {
-    let (path, _directory) = setup();
-    let database = ok!(sqlite::open(&path));
-    match database.execute(":)", None) {
-        Err(error) => assert_eq!(error.message, Some(String::from(r#"unrecognized token: ":""#))),
-        _ => assert!(false),
-    }
-}
-
 fn setup() -> (PathBuf, Directory) {
     let directory = ok!(Directory::new("sqlite"));
     (directory.path().join("database.sqlite3"), directory)