diff --git a/opml_api/source/lib.rs b/opml_api/source/lib.rs
index 5e2d457..d8aa00f 100644
--- a/opml_api/source/lib.rs
+++ b/opml_api/source/lib.rs
@@ -109,7 +109,7 @@ impl OPML {
 
     // SPEC: The version attribute is a version string, of the form, x.y, where
     // x and y are both numeric strings.
-    let valid_versions = vec!["1.0", "1.1", "2.0"];
+    let valid_versions = ["1.0", "1.1", "2.0"];
 
     if !valid_versions.contains(&opml.version.as_str()) {
       return Err(Error::UnsupportedVersion(opml.version));
diff --git a/opml_api/tests/spec_samples.rs b/opml_api/tests/spec_samples.rs
index ed48722..cb79ed1 100644
--- a/opml_api/tests/spec_samples.rs
+++ b/opml_api/tests/spec_samples.rs
@@ -14,7 +14,7 @@ pub fn test_spec_samples() -> Result<(), Box<dyn Error>> {
   ];
 
   for sample in samples {
-    let sample_content = fs::read_to_string(&sample)?;
+    let sample_content = fs::read_to_string(sample)?;
     OPML::from_str(&sample_content)?;
   }