diff --git a/scripts/test.sh b/scripts/test.sh
index 03707d1..e6f21bd 100755
--- a/scripts/test.sh
+++ b/scripts/test.sh
@@ -7,6 +7,6 @@ fi
 
 cargo fmt -- --check
 cargo clippy --all-targets --all-features -- -D warnings
-cargo check
+cargo check --frozen
 cargo test
 cargo test -- --ignored
diff --git a/src/index/io.rs b/src/index/io.rs
index dde0944..044539b 100644
--- a/src/index/io.rs
+++ b/src/index/io.rs
@@ -55,7 +55,7 @@ impl Index {
         fs::create_dir_all(
             path.as_ref()
                 .parent()
-                .ok_or(anyhow!("cannot compute parent path for {}", path.as_ref().to_string_lossy()))?,
+                .ok_or_else(|| anyhow!("cannot compute parent path for {}", path.as_ref().to_string_lossy()))?,
         )
         .context("create index directory")?;
 
@@ -108,10 +108,7 @@ impl Index {
         Ok(self
             .index_file_path()
             .parent()
-            .ok_or(anyhow!(
-                "cannot compute parent path for {}",
-                self.index_file_path().to_string_lossy()
-            ))?
+            .ok_or_else(|| anyhow!("cannot compute parent path for {}", self.index_file_path().to_string_lossy()))?
             .to_path_buf())
     }
 }
diff --git a/src/repository.rs b/src/repository.rs
index 0b7bfe7..d7ae664 100644
--- a/src/repository.rs
+++ b/src/repository.rs
@@ -113,10 +113,9 @@ impl<'a> Repository<'a> {
         let destination_path = Path::new(&destination_path);
 
         if source_path.is_file() {
-            let parent = destination_path.parent().ok_or(anyhow!(
-                "cannot compute parent path for {}",
-                &destination_path.to_string_lossy()
-            ))?;
+            let parent = destination_path
+                .parent()
+                .ok_or_else(|| anyhow!("cannot compute parent path for {}", &destination_path.to_string_lossy()))?;
             fs::create_dir_all(parent)?;
             fs::copy(source_path, destination_path)?;
             let relative_path = destination_path.strip_prefix(self.path)?;
diff --git a/src/repository_item.rs b/src/repository_item.rs
index 86df6d7..2370c39 100644
--- a/src/repository_item.rs
+++ b/src/repository_item.rs
@@ -36,7 +36,7 @@ impl RepositoryItem {
         }
         let parent = target_path
             .parent()
-            .ok_or(anyhow!("cannot compute parent path for {}", &target_path.to_string_lossy()))?;
+            .ok_or_else(|| anyhow!("cannot compute parent path for {}", &target_path.to_string_lossy()))?;
         if !parent.exists() {
             fs::create_dir_all(parent)?;
         }