diff --git a/Cargo.toml b/Cargo.toml
index d900a53..0a751e9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2018"
 [dependencies]
 env_logger = "0.8"
 log = "0.4"
-tokio = { version = "1.2", features = ["macros", "rt"]}
+tokio = { version = "1.2", features = ["macros", "rt", "rt-multi-thread"]}
 reqwest = "0.11"
 minidom = "0.13"
 url = { version = "2.2", features = ["serde"] }
diff --git a/src/bin/dummy.rs b/src/bin/dummy.rs
new file mode 100644
index 0000000..eabd92e
--- /dev/null
+++ b/src/bin/dummy.rs
@@ -0,0 +1,17 @@
+use my_tasks::client::Client;
+use my_tasks::settings::URL;
+use my_tasks::settings::USERNAME;
+use my_tasks::settings::PASSWORD;
+
+
+#[tokio::main]
+async fn main() {
+    // This is just a function to silence "unused function" warning
+
+    let mut client = Client::new(URL, USERNAME, PASSWORD).unwrap();
+    let calendars = client.get_calendars().await.unwrap();
+    let _ = calendars.iter()
+        .map(|cal| println!("  {}\t{}", cal.name(), cal.url().as_str()))
+        .collect::<()>();
+    let _ = client.get_tasks(&calendars[3].url()).await;
+}
diff --git a/src/lib.rs b/src/lib.rs
index 0b0eb21..1724ca4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -8,7 +8,7 @@
 //! A `Provider` abstracts these two sources by merging them together into one virtual source. \
 //! It also handles synchronisation between the local cache and the server.
 
-mod calendar;
+pub mod calendar;
 pub use calendar::Calendar;
 mod task;
 pub use task::Task;
diff --git a/src/utils.rs b/src/utils.rs
index fa80b76..b0e0a1b 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -46,7 +46,6 @@ pub fn print_xml(element: &Element) {
         std::io::stdout(),
         0x20, 4
     );
-    element.to_writer(&mut xml_writer);
-
-    writer.write(&[0x0a]);
+    let _ = element.to_writer(&mut xml_writer);
+    let _ = writer.write(&[0x0a]);
 }
diff --git a/tests/caldav_client.rs b/tests/caldav_client.rs
index 25f04ec..314fd0c 100644
--- a/tests/caldav_client.rs
+++ b/tests/caldav_client.rs
@@ -1,97 +1,94 @@
-//! Some tests of a CalDAV client.
-//! Most of them are not really integration tests, but just development tests that should be cleaned up one day.
-
-use std::error::Error;
-use std::convert::TryFrom;
-
-use reqwest::Method;
-use reqwest::header::CONTENT_TYPE;
-use minidom::Element;
-use url::Url;
-
-use my_tasks::client::Client;
-use my_tasks::settings::URL;
-use my_tasks::settings::USERNAME;
-use my_tasks::settings::PASSWORD;
-use my_tasks::settings::EXAMPLE_TASK_URL;
-use my_tasks::settings::EXAMPLE_CALENDAR_URL;
-
-static EXAMPLE_TASKS_BODY_LAST_MODIFIED: &str = r#"
-<C:calendar-query xmlns:D="DAV:"
-              xmlns:C="urn:ietf:params:xml:ns:caldav">
-  <D:prop>
-    <D:getetag/>
-    <C:calendar-data />
-  </D:prop>
-  <C:filter>
-    <C:comp-filter name="VCALENDAR">
-      <C:comp-filter name="VTODO">
-        <C:prop-filter name="LAST-MODIFIED">
-            <C:time-range start="20210220T000000Z"
-                          end="20260105T000000Z"/>
-        </C:prop-filter>
-      </C:comp-filter>
-    </C:comp-filter>
-  </C:filter>
-</C:calendar-query>
-"#;
-
-#[tokio::test]
-async fn test_client() {
-    let _ = env_logger::builder().is_test(true).try_init();
-
-    let mut client = Client::new(URL, USERNAME, PASSWORD).unwrap();
-    let calendars = client.get_calendars().await.unwrap();
-
-    println!("Calendars:");
-    calendars.iter()
-        .map(|cal| println!("  {}\t{}", cal.name(), cal.url().as_str()))
-        .collect::<()>();
-
-    client.get_tasks(&calendars[3].url()).await;
-}
-
-#[tokio::test]
-async fn profind() {
-    let _ = env_logger::builder().is_test(true).try_init();
-
-    let url: Url = EXAMPLE_TASK_URL.parse().unwrap();
-
-    let method = Method::from_bytes(b"PROPFIND")
-        .expect("cannot create PROPFIND method.");
-
-    let res = reqwest::Client::new()
-        .request(method, url.as_str())
-        .header("Depth", 0)
-        .header(CONTENT_TYPE, "application/xml")
-        .basic_auth(USERNAME, Some(PASSWORD))
-        //.body(body)
-        .send()
-        .await
-        .unwrap();
-
-    println!("{:?}", res.text().await);
-}
-
-#[tokio::test]
-async fn last_modified() {
-    let _ = env_logger::builder().is_test(true).try_init();
-
-    let url: Url = EXAMPLE_CALENDAR_URL.parse().unwrap();
-
-    let method = Method::from_bytes(b"REPORT")
-        .expect("cannot create REPORT method.");
-
-    let res = reqwest::Client::new()
-        .request(method, url.as_str())
-        .header("Depth", 1)
-        .header(CONTENT_TYPE, "application/xml")
-        .basic_auth(USERNAME, Some(PASSWORD))
-        .body(EXAMPLE_TASKS_BODY_LAST_MODIFIED)
-        .send()
-        .await
-        .unwrap();
-
-    let el: Element = res.text().await.unwrap().parse().unwrap();
-    my_tasks::utils::print_xml(&el);
-}
+//! Some tests of a CalDAV client.
+//! Most of them are not really integration tests, but just development tests that should be cleaned up one day.
+
+use reqwest::Method;
+use reqwest::header::CONTENT_TYPE;
+use minidom::Element;
+use url::Url;
+
+use my_tasks::client::Client;
+use my_tasks::settings::URL;
+use my_tasks::settings::USERNAME;
+use my_tasks::settings::PASSWORD;
+use my_tasks::settings::EXAMPLE_TASK_URL;
+use my_tasks::settings::EXAMPLE_CALENDAR_URL;
+
+static EXAMPLE_TASKS_BODY_LAST_MODIFIED: &str = r#"
+<C:calendar-query xmlns:D="DAV:"
+              xmlns:C="urn:ietf:params:xml:ns:caldav">
+  <D:prop>
+    <D:getetag/>
+    <C:calendar-data />
+  </D:prop>
+  <C:filter>
+    <C:comp-filter name="VCALENDAR">
+      <C:comp-filter name="VTODO">
+        <C:prop-filter name="LAST-MODIFIED">
+            <C:time-range start="20210220T000000Z"
+                          end="20260105T000000Z"/>
+        </C:prop-filter>
+      </C:comp-filter>
+    </C:comp-filter>
+  </C:filter>
+</C:calendar-query>
+"#;
+
+#[tokio::test]
+async fn test_client() {
+    let _ = env_logger::builder().is_test(true).try_init();
+
+    let mut client = Client::new(URL, USERNAME, PASSWORD).unwrap();
+    let calendars = client.get_calendars().await.unwrap();
+
+    println!("Calendars:");
+    let _ = calendars.iter()
+        .map(|cal| println!("  {}\t{}", cal.name(), cal.url().as_str()))
+        .collect::<()>();
+
+    let _ = client.get_tasks(&calendars[3].url()).await;
+}
+
+#[tokio::test]
+async fn profind() {
+    let _ = env_logger::builder().is_test(true).try_init();
+
+    let url: Url = EXAMPLE_TASK_URL.parse().unwrap();
+
+    let method = Method::from_bytes(b"PROPFIND")
+        .expect("cannot create PROPFIND method.");
+
+    let res = reqwest::Client::new()
+        .request(method, url.as_str())
+        .header("Depth", 0)
+        .header(CONTENT_TYPE, "application/xml")
+        .basic_auth(USERNAME, Some(PASSWORD))
+        //.body(body)
+        .send()
+        .await
+        .unwrap();
+
+    println!("{:?}", res.text().await);
+}
+
+#[tokio::test]
+async fn last_modified() {
+    let _ = env_logger::builder().is_test(true).try_init();
+
+    let url: Url = EXAMPLE_CALENDAR_URL.parse().unwrap();
+
+    let method = Method::from_bytes(b"REPORT")
+        .expect("cannot create REPORT method.");
+
+    let res = reqwest::Client::new()
+        .request(method, url.as_str())
+        .header("Depth", 1)
+        .header(CONTENT_TYPE, "application/xml")
+        .basic_auth(USERNAME, Some(PASSWORD))
+        .body(EXAMPLE_TASKS_BODY_LAST_MODIFIED)
+        .send()
+        .await
+        .unwrap();
+
+    let el: Element = res.text().await.unwrap().parse().unwrap();
+    my_tasks::utils::print_xml(&el);
+}