diff --git a/lib/src/request.rs b/lib/src/request.rs
index 0359652..f86272b 100644
--- a/lib/src/request.rs
+++ b/lib/src/request.rs
@@ -211,7 +211,7 @@ impl Request {
             .offsets
             .iter()
             .position(|v| v == &offset)
-            .ok_or_else(|| Error::InvalidArgument("offset is not a requested line.".to_string()))?;
+            .ok_or_else(|| Error::InvalidArgument("offset is not a requested line.".into()))?;
         self.do_value(idx)
     }
     #[cfg(all(feature = "uapi_v1", feature = "uapi_v2"))]
@@ -285,7 +285,7 @@ impl Request {
         if !values.contains_keys(&self.offsets) {
             return Err(Error::AbiLimitation(
                 AbiVersion::V1,
-                "requires all requested lines".to_string(),
+                "requires all requested lines".into(),
             ));
         }
         v1::set_line_values(&self.f, &values.to_v1(&self.offsets))
@@ -296,7 +296,7 @@ impl Request {
         let lv = &values.to_v2(&self.offsets);
         if lv.mask == 0 {
             return Err(Error::InvalidArgument(
-                "no requested lines in set values.".to_string(),
+                "no requested lines in set values.".into(),
             ));
         }
         v2::set_line_values(&self.f, lv).map_err(|e| Error::Uapi(UapiCall::SetLineValues, e))
@@ -322,7 +322,7 @@ impl Request {
             .offsets
             .iter()
             .position(|v| v == &offset)
-            .ok_or_else(|| Error::InvalidArgument("offset is not a requested line.".to_string()))?;
+            .ok_or_else(|| Error::InvalidArgument("offset is not a requested line.".into()))?;
         self.do_set_value(idx, value)
     }
     #[cfg(all(feature = "uapi_v1", feature = "uapi_v2"))]
@@ -345,7 +345,7 @@ impl Request {
         if self.offsets.len() > 1 {
             return Err(Error::AbiLimitation(
                 AbiVersion::V1,
-                "requires all requested lines".to_string(),
+                "requires all requested lines".into(),
             ));
         }
         let mut vals = v1::LineValues::default();
@@ -426,13 +426,13 @@ impl Request {
                 {
                     return Err(Error::AbiLimitation(
                         AbiVersion::V1,
-                        "cannot reconfigure lines with edge detection".to_string(),
+                        "cannot reconfigure lines with edge detection".into(),
                     ));
                 }
                 if cfg.unique()?.edge_detection.is_some() {
                     return Err(Error::AbiLimitation(
                         AbiVersion::V1,
-                        "cannot reconfigure edge detection".to_string(),
+                        "cannot reconfigure edge detection".into(),
                     ));
                 }
                 v1::set_line_config(&self.f, cfg.to_v1()?)
@@ -454,13 +454,13 @@ impl Request {
         {
             return Err(Error::AbiLimitation(
                 AbiVersion::V1,
-                "cannot reconfigure lines with edge detection".to_string(),
+                "cannot reconfigure lines with edge detection".into(),
             ));
         }
         if cfg.unique()?.edge_detection.is_some() {
             return Err(Error::AbiLimitation(
                 AbiVersion::V1,
-                "cannot reconfigure edge detection".to_string(),
+                "cannot reconfigure edge detection".into(),
             ));
         }
         v1::set_line_config(&self.f, cfg.to_v1()?)
diff --git a/lib/src/request/builder.rs b/lib/src/request/builder.rs
index 8b0bfe0..1026683 100644
--- a/lib/src/request/builder.rs
+++ b/lib/src/request/builder.rs
@@ -105,7 +105,7 @@ impl Builder {
             return Err(e.clone());
         }
         if self.cfg.chip.as_os_str().is_empty() {
-            return Err(Error::InvalidArgument("No chip specified.".to_string()));
+            return Err(Error::InvalidArgument("No chip specified.".into()));
         }
         let chip = Chip::from_path(&self.cfg.chip)?;
         self.cfg.offsets.sort_unstable();
@@ -274,7 +274,7 @@ impl Builder {
             self.cfg.on_chip(path);
         } else if self.cfg.chip != path.into() {
             self.err = Some(Error::InvalidArgument(
-                "Multiple chips requested.".to_string(),
+                "Multiple chips requested.".into(),
             ))
         }
         self
@@ -482,7 +482,7 @@ impl Builder {
     // Conversions into uAPI types.
     fn to_uapi(&self) -> Result<UapiRequest> {
         if self.cfg.num_lines() == 0 {
-            return Err(Error::InvalidArgument("No lines specified.".to_string()));
+            return Err(Error::InvalidArgument("No lines specified.".into()));
         }
         if self.cfg.offsets.len() > NUM_LINES_MAX {
             return Err(Error::InvalidArgument(format!(
@@ -514,20 +514,20 @@ impl Builder {
         if self.kernel_event_buffer_size != 0 {
             return Err(Error::AbiLimitation(
                 AbiVersion::V1,
-                "does not support setting event buffer size".to_string(),
+                "does not support setting event buffer size".into(),
             ));
         }
         let lcfg = self.cfg.unique()?;
         if lcfg.debounce_period.is_some() {
             return Err(Error::AbiLimitation(
                 AbiVersion::V1,
-                "does not support debounce".to_string(),
+                "does not support debounce".into(),
             ));
         }
         if lcfg.event_clock.is_some() {
             return Err(Error::AbiLimitation(
                 AbiVersion::V1,
-                "does not support selecting the event clock source".to_string(),
+                "does not support selecting the event clock source".into(),
             ));
         }
         let consumer = if self.consumer.is_empty() {
@@ -539,7 +539,7 @@ impl Builder {
             if self.cfg.offsets.len() != 1 {
                 return Err(Error::AbiLimitation(
                     AbiVersion::V1,
-                    "only supports edge detection on single line requests".to_string(),
+                    "only supports edge detection on single line requests".into(),
                 ));
             }
             Ok(UapiRequest::Event(v1::EventRequest {
diff --git a/lib/src/request/config.rs b/lib/src/request/config.rs
index 4bef40f..0917132 100644
--- a/lib/src/request/config.rs
+++ b/lib/src/request/config.rs
@@ -255,7 +255,7 @@ impl Config {
             Ok(self)
         } else {
             Err(Error::InvalidArgument(
-                "Multiple chips requested.".to_string(),
+                "Multiple chips requested.".into(),
             ))
         }
     }
@@ -403,7 +403,7 @@ impl Config {
                 if !lcfg.equivalent(self.lcfg.get(offset).unwrap()) {
                     return Err(Error::AbiLimitation(
                         AbiVersion::V1,
-                        "requires all lines to share the same configuration".to_string(),
+                        "requires all lines to share the same configuration".into(),
                     ));
                 }
             }
diff --git a/lib/tests/request.rs b/lib/tests/request.rs
index b0aa029..591394f 100644
--- a/lib/tests/request.rs
+++ b/lib/tests/request.rs
@@ -70,7 +70,7 @@ mod builder {
                 .request();
             assert_eq!(
                 res.unwrap_err(),
-                gpiocdev::Error::AbiLimitation(V1, "does not support debounce".to_string(),)
+                gpiocdev::Error::AbiLimitation(V1, "does not support debounce".into(),)
             );
         }
 
@@ -93,7 +93,7 @@ mod builder {
                 res.unwrap_err(),
                 gpiocdev::Error::AbiLimitation(
                     V1,
-                    "does not support selecting the event clock source".to_string(),
+                    "does not support selecting the event clock source".into(),
                 )
             );
         }
@@ -117,7 +117,7 @@ mod builder {
                 res.unwrap_err(),
                 gpiocdev::Error::AbiLimitation(
                     V1,
-                    "does not support setting event buffer size".to_string(),
+                    "does not support setting event buffer size".into(),
                 )
             );
         }
@@ -680,7 +680,7 @@ mod builder {
                 .as_input()
                 .request()
                 .unwrap_err(),
-            gpiocdev::Error::InvalidArgument("Multiple chips requested.".to_string())
+            gpiocdev::Error::InvalidArgument("Multiple chips requested.".into())
         );
     }
 
@@ -828,7 +828,7 @@ mod builder {
             .request();
         assert_eq!(
             res.unwrap_err(),
-            gpiocdev::Error::InvalidArgument("Multiple chips requested.".to_string())
+            gpiocdev::Error::InvalidArgument("Multiple chips requested.".into())
         );
     }
 
@@ -1285,7 +1285,7 @@ mod request {
         let res = req.value(3);
         assert_eq!(
             res.unwrap_err(),
-            gpiocdev::Error::InvalidArgument("offset is not a requested line.".to_string())
+            gpiocdev::Error::InvalidArgument("offset is not a requested line.".into())
         );
     }
 
@@ -1415,7 +1415,7 @@ mod request {
                     req.set_value(*offset, Value::Active).unwrap_err(),
                     gpiocdev::Error::AbiLimitation(
                         AbiVersion::V1,
-                        "requires all requested lines".to_string(),
+                        "requires all requested lines".into(),
                     )
                 );
             }
@@ -1425,7 +1425,7 @@ mod request {
         let res = req.set_value(3, Value::Active);
         assert_eq!(
             res.unwrap_err(),
-            gpiocdev::Error::InvalidArgument("offset is not a requested line.".to_string())
+            gpiocdev::Error::InvalidArgument("offset is not a requested line.".into())
         );
     }
 
@@ -1501,7 +1501,7 @@ mod request {
                 req.set_values(&vals).unwrap_err(),
                 gpiocdev::Error::AbiLimitation(
                     AbiVersion::V1,
-                    "requires all requested lines".to_string(),
+                    "requires all requested lines".into(),
                 )
             );
 
@@ -1512,7 +1512,7 @@ mod request {
                 req.set_values(&vals).unwrap_err(),
                 gpiocdev::Error::AbiLimitation(
                     AbiVersion::V1,
-                    "requires all requested lines".to_string(),
+                    "requires all requested lines".into(),
                 )
             );
 
@@ -1522,7 +1522,7 @@ mod request {
                 req.set_values(&vals),
                 Err(gpiocdev::Error::AbiLimitation(
                     AbiVersion::V1,
-                    "requires all requested lines".to_string()
+                    "requires all requested lines".into()
                 ))
             );
         }