diff --git a/src/directory/error.rs b/src/directory/error.rs
index dda059ca1..9f8e6ad51 100644
--- a/src/directory/error.rs
+++ b/src/directory/error.rs
@@ -32,7 +32,7 @@ impl LockError {
 /// Error that may occur when opening a directory
 #[derive(Debug, Clone, Error)]
 pub enum OpenDirectoryError {
-    /// The underlying directory does not exists.
+    /// The underlying directory does not exist.
     #[error("Directory does not exist: '{0}'.")]
     DoesNotExist(PathBuf),
     /// The path exists but is not a directory.
@@ -151,8 +151,8 @@ impl fmt::Debug for Incompatibility {
 /// Error that may occur when accessing a file read
 #[derive(Debug, Clone, Error)]
 pub enum OpenReadError {
-    /// The file does not exists.
-    #[error("Files does not exists: {0:?}")]
+    /// The file does not exist.
+    #[error("Files does not exist: {0:?}")]
     FileDoesNotExist(PathBuf),
     /// Any kind of io::Error.
     #[error(
@@ -181,8 +181,8 @@ impl OpenReadError {
 /// Error that may occur when trying to delete a file
 #[derive(Debug, Clone, Error)]
 pub enum DeleteError {
-    /// The file does not exists.
-    #[error("File does not exists: '{0}'.")]
+    /// The file does not exist.
+    #[error("File does not exist: '{0}'.")]
     FileDoesNotExist(PathBuf),
     /// Any kind of IO error that happens when
     /// interacting with the underlying IO device.
diff --git a/src/query/query_parser/query_parser.rs b/src/query/query_parser/query_parser.rs
index 652ff146d..78f865b50 100644
--- a/src/query/query_parser/query_parser.rs
+++ b/src/query/query_parser/query_parser.rs
@@ -36,7 +36,7 @@ pub enum QueryParserError {
     #[error("Unsupported query: {0}")]
     UnsupportedQuery(String),
     /// The query references a field that is not in the schema
-    #[error("Field does not exists: '{0}'")]
+    #[error("Field does not exist: '{0}'")]
     FieldDoesNotExist(String),
     /// The query contains a term for a `u64` or `i64`-field, but the value
     /// is neither.
diff --git a/stacker/src/arena_hashmap.rs b/stacker/src/arena_hashmap.rs
index 5bd8eaf22..67147d64a 100644
--- a/stacker/src/arena_hashmap.rs
+++ b/stacker/src/arena_hashmap.rs
@@ -209,7 +209,7 @@ impl ArenaHashMap {
         }
     }
 
-    /// `update` create a new entry for a given key if it does not exists
+    /// `update` create a new entry for a given key if it does not exist
     /// or updates the existing entry.
     ///
     /// The actual logic for this update is define in the `updater`
@@ -237,7 +237,7 @@ impl ArenaHashMap {
             let bucket = probe.next_probe();
             let kv: KeyValue = self.table[bucket];
             if kv.is_empty() {
-                // The key does not exists yet.
+                // The key does not exist yet.
                 let val = updater(None);
                 let num_bytes = std::mem::size_of::<u16>() + key.len() + std::mem::size_of::<V>();
                 let key_addr = self.memory_arena.allocate_space(num_bytes);