diff --git a/src/oath/cbindings.rs b/src/oath/cbindings.rs
index bf533fe..d63b1b6 100644
--- a/src/oath/cbindings.rs
+++ b/src/oath/cbindings.rs
@@ -9,22 +9,22 @@ use std::ffi::CStr;
 use std::time::SystemTime;
 
 macro_rules! otp_init {
-    ($cfg_type: ty, $cfg: ident, $($field: ident, $value: expr), *) => {
-        if $cfg.is_null() {
-            Err(ErrorCode::NullPtr)
-        } else {
-                let c: &mut $cfg_type = deref_ptr_mut!($cfg, ErrorCode::NullPtr);
-                c.key = std::ptr::null();
-                c.key_len = 0;
-                c.output_len = crate::oath::DEFAULT_OTP_OUT_LEN;
-                c.output_base = std::ptr::null();
-                c.hash_function = crate::oath::DEFAULT_OTP_HASH;
-                $(
-                    c.$field = $value;
-                )*
-                Ok(c)
-        }
-    }
+	($cfg_type: ty, $cfg: ident, $($field: ident, $value: expr), *) => {
+		if $cfg.is_null() {
+			Err(ErrorCode::NullPtr)
+		} else {
+			let c: &mut $cfg_type = deref_ptr_mut!($cfg, ErrorCode::NullPtr);
+			c.key = std::ptr::null();
+			c.key_len = 0;
+			c.output_len = crate::oath::DEFAULT_OTP_OUT_LEN;
+			c.output_base = std::ptr::null();
+			c.hash_function = crate::oath::DEFAULT_OTP_HASH;
+			$(
+				c.$field = $value;
+			)*
+				Ok(c)
+		}
+	}
 }
 
 /// [C binding] HOTP configuration storage
diff --git a/src/oath/hotp.rs b/src/oath/hotp.rs
index c407f54..8b9e414 100644
--- a/src/oath/hotp.rs
+++ b/src/oath/hotp.rs
@@ -1334,9 +1334,9 @@ mod tests {
 			.finalize();
 
 		assert_eq!(
-            uri,
-            "otpauth://hotp/Provider%201:alice@example.com?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=Provider+1&counter=0"
-        );
+			uri,
+			"otpauth://hotp/Provider%201:alice@example.com?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=Provider+1&counter=0"
+		);
 	}
 
 	#[test]
@@ -1356,9 +1356,9 @@ mod tests {
 			.finalize();
 
 		assert_eq!(
-            uri,
-            "otpauth://hotp/Provider%201:alice@example.com?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&counter=0"
-        );
+			uri,
+			"otpauth://hotp/Provider%201:alice@example.com?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&counter=0"
+		);
 	}
 
 	#[test]
@@ -1373,9 +1373,9 @@ mod tests {
 			.finalize();
 
 		assert_eq!(
-            uri,
-            "otpauth://hotp/Provider1Label?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=Provider1&counter=0"
-        );
+			uri,
+			"otpauth://hotp/Provider1Label?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=Provider1&counter=0"
+		);
 	}
 
 	#[test]
@@ -1392,8 +1392,8 @@ mod tests {
 
 		assert_eq!(uri.len(), 141);
 		assert!(uri.starts_with(
-                "otpauth://hotp/Provider1:alice@example.com?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=Provider1&counter=0&"
-        ));
+			"otpauth://hotp/Provider1:alice@example.com?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=Provider1&counter=0&"
+		));
 		assert!(uri.contains("&foo=bar+baz"));
 		assert!(uri.contains("&foo+2=%C3%A8_%C3%A9"));
 	}
diff --git a/src/oath/totp.rs b/src/oath/totp.rs
index a7685e1..306a8de 100644
--- a/src/oath/totp.rs
+++ b/src/oath/totp.rs
@@ -889,9 +889,9 @@ mod tests {
 			.finalize();
 
 		assert_eq!(
-            uri,
-            "otpauth://totp/Provider1:alice@example.com?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=Provider1"
-        );
+			uri,
+			"otpauth://totp/Provider1:alice@example.com?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=Provider1"
+		);
 	}
 
 	#[test]
@@ -905,9 +905,9 @@ mod tests {
 			.finalize();
 
 		assert_eq!(
-            uri,
-            "otpauth://totp/%C3%B6_%C3%88%20%E2%80%A6:D%C3%ABrp+toto@example.com?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=%C3%B6_%C3%88+%E2%80%A6"
-        );
+			uri,
+			"otpauth://totp/%C3%B6_%C3%88%20%E2%80%A6:D%C3%ABrp+toto@example.com?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=%C3%B6_%C3%88+%E2%80%A6"
+		);
 	}
 
 	#[test]
@@ -922,9 +922,9 @@ mod tests {
 			.finalize();
 
 		assert_eq!(
-            uri,
-            "otpauth://totp/Provider1Label?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=Provider1"
-        );
+			uri,
+			"otpauth://totp/Provider1Label?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=Provider1"
+		);
 	}
 
 	#[test]
@@ -939,9 +939,9 @@ mod tests {
 			.finalize();
 
 		assert_eq!(
-            uri,
-            "otpauth://totp/Provider1:alice@example.com?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=Provider1&foo=bar+baz"
-        );
+			uri,
+			"otpauth://totp/Provider1:alice@example.com?secret=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ&issuer=Provider1&foo=bar+baz"
+		);
 	}
 
 	#[test]