diff --git a/src/find/matchers/delete.rs b/src/find/matchers/delete.rs
index e2c15e7..553bd8a 100644
--- a/src/find/matchers/delete.rs
+++ b/src/find/matchers/delete.rs
@@ -27,7 +27,7 @@ impl DeleteMatcher {
         })
     }
 
-    pub fn new_box() -> io::Result<Box<Matcher>> {
+    pub fn new_box() -> io::Result<Box<dyn Matcher>> {
         Ok(Box::new(DeleteMatcher::new()?))
     }
 
diff --git a/src/find/matchers/mod.rs b/src/find/matchers/mod.rs
index 0310b4d..442891f 100644
--- a/src/find/matchers/mod.rs
+++ b/src/find/matchers/mod.rs
@@ -484,7 +484,7 @@ mod tests {
             let mut config = Config::default();
 
             if let Err(e) = build_top_level_matcher(&[arg], &mut config) {
-                assert!(e.description().contains("expected an expression"));
+                assert!(e.to_string().contains("expected an expression"));
             } else {
                 panic!("parsing arugment lists that end in -not should fail");
             }
@@ -521,8 +521,8 @@ mod tests {
             let mut config = Config::default();
 
             if let Err(e) = build_top_level_matcher(&[arg], &mut config) {
-                assert!(e.description().contains("missing argument to"));
-                assert!(e.description().contains(arg));
+                assert!(e.to_string().contains("missing argument to"));
+                assert!(e.to_string().contains(arg));
             } else {
                 panic!("parsing arugment lists that end in -not should fail");
             }
@@ -535,7 +535,7 @@ mod tests {
             let mut config = Config::default();
 
             if let Err(e) = build_top_level_matcher(&[arg, "-true"], &mut config) {
-                assert!(e.description().contains("you have used a binary operator"));
+                assert!(e.to_string().contains("you have used a binary operator"));
             } else {
                 panic!("parsing arugment list that begins with -or should fail");
             }
@@ -548,7 +548,7 @@ mod tests {
             let mut config = Config::default();
 
             if let Err(e) = build_top_level_matcher(&["-true", arg], &mut config) {
-                assert!(e.description().contains("expected an expression"));
+                assert!(e.to_string().contains("expected an expression"));
             } else {
                 panic!("parsing arugment list that ends with -or should fail");
             }
@@ -560,7 +560,7 @@ mod tests {
         let mut config = Config::default();
 
         if let Err(e) = build_top_level_matcher(&["-a", "-true"], &mut config) {
-            assert!(e.description().contains("you have used a binary operator"));
+            assert!(e.to_string().contains("you have used a binary operator"));
         } else {
             panic!("parsing arugment list that begins with -a should fail");
         }
@@ -571,7 +571,7 @@ mod tests {
         let mut config = Config::default();
 
         if let Err(e) = build_top_level_matcher(&["-true", "-a"], &mut config) {
-            assert!(e.description().contains("expected an expression"));
+            assert!(e.to_string().contains("expected an expression"));
         } else {
             panic!("parsing arugment list that ends with -or should fail");
         }
@@ -673,13 +673,13 @@ mod tests {
         let mut config = Config::default();
 
         if let Err(e) = build_top_level_matcher(&[",", "-true"], &mut config) {
-            assert!(e.description().contains("you have used a binary operator"));
+            assert!(e.to_string().contains("you have used a binary operator"));
         } else {
             panic!("parsing arugment list that begins with , should fail");
         }
 
         if let Err(e) = build_top_level_matcher(&["-true", "-o", ",", "-true"], &mut config) {
-            assert!(e.description().contains("you have used a binary operator"));
+            assert!(e.to_string().contains("you have used a binary operator"));
         } else {
             panic!("parsing arugment list that contains '-o  ,' should fail");
         }
@@ -690,7 +690,7 @@ mod tests {
         let mut config = Config::default();
 
         if let Err(e) = build_top_level_matcher(&["-true", ","], &mut config) {
-            assert!(e.description().contains("expected an expression"));
+            assert!(e.to_string().contains("expected an expression"));
         } else {
             panic!("parsing arugment list that ends with , should fail");
         }
@@ -701,7 +701,7 @@ mod tests {
         let mut config = Config::default();
 
         if let Err(e) = build_top_level_matcher(&["-true", "("], &mut config) {
-            assert!(e.description().contains("I was expecting to find a ')'"));
+            assert!(e.to_string().contains("I was expecting to find a ')'"));
         } else {
             panic!("parsing arugment list with not enough closing brackets should fail");
         }
@@ -712,7 +712,7 @@ mod tests {
         let mut config = Config::default();
 
         if let Err(e) = build_top_level_matcher(&["-true", "(", ")", ")"], &mut config) {
-            assert!(e.description().contains("too many ')'"));
+            assert!(e.to_string().contains("too many ')'"));
         } else {
             panic!("parsing arugment list with too many closing brackets should fail");
         }
@@ -909,7 +909,7 @@ mod tests {
 
         if let Err(e) = build_top_level_matcher(&["-ctime", "-123."], &mut config) {
             assert!(
-                e.description().contains("Expected a decimal integer"),
+                e.to_string().contains("Expected a decimal integer"),
                 "bad description: {}",
                 e
             );
@@ -923,19 +923,19 @@ mod tests {
         let mut config = Config::default();
 
         if let Err(e) = build_top_level_matcher(&["-exec"], &mut config) {
-            assert!(e.description().contains("missing argument"));
+            assert!(e.to_string().contains("missing argument"));
         } else {
             panic!("parsing argument list with exec and no executable or semi-colon should fail");
         }
 
         if let Err(e) = build_top_level_matcher(&["-exec", ";"], &mut config) {
-            assert!(e.description().contains("missing argument"));
+            assert!(e.to_string().contains("missing argument"));
         } else {
             panic!("parsing argument list with exec and no executable should fail");
         }
 
         if let Err(e) = build_top_level_matcher(&["-exec", "foo"], &mut config) {
-            assert!(e.description().contains("missing argument"));
+            assert!(e.to_string().contains("missing argument"));
         } else {
             panic!("parsing argument list with exec and no executable should fail");
         }
@@ -973,13 +973,13 @@ mod tests {
     fn build_top_level_matcher_perm_bad() {
         let mut config = Config::default();
         if let Err(e) = build_top_level_matcher(&["-perm", "foo"], &mut config) {
-            assert!(e.description().contains("invalid mode"));
+            assert!(e.to_string().contains("invalid mode"));
         } else {
             panic!("-perm with bad mode pattern should fail");
         }
 
         if let Err(e) = build_top_level_matcher(&["-perm"], &mut config) {
-            assert!(e.description().contains("missing argument"));
+            assert!(e.to_string().contains("missing argument"));
         } else {
             panic!("-perm with no mode pattern should fail");
         }
@@ -990,13 +990,13 @@ mod tests {
     fn build_top_level_matcher_perm_not_unix() {
         let mut config = Config::default();
         if let Err(e) = build_top_level_matcher(&["-perm", "444"], &mut config) {
-            assert!(e.description().contains("not available"));
+            assert!(e.to_string().contains("not available"));
         } else {
             panic!("-perm on non-unix systems shouldn't be available");
         }
 
         if let Err(e) = build_top_level_matcher(&["-perm"], &mut config) {
-            assert!(e.description().contains("missing argument"));
+            assert!(e.to_string().contains("missing argument"));
         } else {
             panic!("-perm with no mode pattern should fail");
         }
diff --git a/src/find/matchers/size.rs b/src/find/matchers/size.rs
index c88ae4c..233df6f 100644
--- a/src/find/matchers/size.rs
+++ b/src/find/matchers/size.rs
@@ -157,7 +157,7 @@ mod tests {
     fn size_matcher_bad_unit() {
         if let Err(e) = SizeMatcher::new(ComparableValue::EqualTo(2), "xyz") {
             assert!(
-                e.description().contains("Invalid suffix") && e.description().contains("xyz"),
+                e.to_string().contains("Invalid suffix") && e.to_string().contains("xyz"),
                 "bad description: {}",
                 e
             );
diff --git a/src/find/mod.rs b/src/find/mod.rs
index f34a0c7..76f577a 100644
--- a/src/find/mod.rs
+++ b/src/find/mod.rs
@@ -118,9 +118,7 @@ fn process_dir<'a>(
     loop {
         match it.next() {
             None => break,
-            Some(Err(err)) => {
-                writeln!(&mut stderr(), "Error: {}: {}", dir, err.description()).unwrap()
-            }
+            Some(Err(err)) => writeln!(&mut stderr(), "Error: {}: {}", dir, err).unwrap(),
             Some(Ok(entry)) => {
                 let mut matcher_io = matchers::MatcherIO::new(deps);
                 if matcher.matches(&entry, &mut matcher_io) {
@@ -265,7 +263,7 @@ mod tests {
     }
 
     impl<'a> Dependencies<'a> for FakeDependencies {
-        fn get_output(&'a self) -> &'a RefCell<Write> {
+        fn get_output(&'a self) -> &'a RefCell<dyn Write> {
             &self.output
         }
 
@@ -286,7 +284,7 @@ mod tests {
         //
         let result = super::parse_args(&["-asdadsafsfsadcs"]);
         if let Err(e) = result {
-            assert_eq!(e.description(), "Unrecognized flag: '-asdadsafsfsadcs'");
+            assert_eq!(e.to_string(), "Unrecognized flag: '-asdadsafsfsadcs'");
         } else {
             panic!("parse_args should have returned an error");
         }
diff --git a/tests/common/test_helpers.rs b/tests/common/test_helpers.rs
index f2016fe..6c723d5 100644
--- a/tests/common/test_helpers.rs
+++ b/tests/common/test_helpers.rs
@@ -44,7 +44,7 @@ impl<'a> FakeDependencies {
 }
 
 impl<'a> Dependencies<'a> for FakeDependencies {
-    fn get_output(&'a self) -> &'a RefCell<Write> {
+    fn get_output(&'a self) -> &'a RefCell<dyn Write> {
         &self.output
     }