diff --git a/src/Commands/RemindCommandGroup.cs b/src/Commands/RemindCommandGroup.cs
index 77f2429..5e8c9c5 100644
--- a/src/Commands/RemindCommandGroup.cs
+++ b/src/Commands/RemindCommandGroup.cs
@@ -111,7 +111,7 @@ public class RemindCommandGroup : CommandGroup
     /// <summary>
     ///     A slash command that schedules a reminder with the specified text.
     /// </summary>
-    /// <param name="stringTimeSpan">The period of time which must pass before the reminder will be sent.</param>
+    /// <param name="timeSpanString">The period of time which must pass before the reminder will be sent.</param>
     /// <param name="text">The text of the reminder.</param>
     /// <returns>A feedback sending result which may or may not have succeeded.</returns>
     [Command("remind")]
@@ -122,7 +122,7 @@ public class RemindCommandGroup : CommandGroup
     public async Task<Result> ExecuteReminderAsync(
         [Description("After what period of time mention the reminder")]
         [Option("in")]
-        string stringTimeSpan,
+        string timeSpanString,
         [Description("Reminder text")] [MaxLength(512)]
         string text)
     {
@@ -146,7 +146,7 @@ public class RemindCommandGroup : CommandGroup
         var data = await _guildData.GetData(guildId, CancellationToken);
         Messages.Culture = GuildSettings.Language.Get(data.Settings);
 
-        var parseResult = TimeSpanParser.TryParse(stringTimeSpan);
+        var parseResult = TimeSpanParser.TryParse(timeSpanString);
         if (!parseResult.IsDefined(out var timeSpan))
         {
             var failedEmbed = new EmbedBuilder()
diff --git a/src/Parsers/TimeSpanParser.cs b/src/Parsers/TimeSpanParser.cs
index e00c09e..4ef8bf2 100644
--- a/src/Parsers/TimeSpanParser.cs
+++ b/src/Parsers/TimeSpanParser.cs
@@ -15,14 +15,11 @@ public partial class TimeSpanParser : AbstractTypeParser<TimeSpan>
     private static readonly Regex Pattern = ParseRegex();
 
     /// <summary>
-    ///     Parses <see cref="TimeSpan"/> from <see cref="string"/>.
+    ///     Parses a <see cref="TimeSpan"/> from the <paramref name="timeSpanString"/>.
     /// </summary>
     /// <returns>
-    ///     Parsed <see cref="TimeSpan"/>.
+    ///     The parsed <see cref="TimeSpan"/>, or <see cref="ArgumentInvalidError"/> if parsing failed.
     /// </returns>
-    /// <remarks>
-    ///     If parse wasn't successful, <see cref="TimeSpanParser"/> will return <see cref="ArgumentInvalidError"/>.
-    /// </remarks>
     public static Result<TimeSpan> TryParse(string timeSpanString)
     {
         if (timeSpanString.StartsWith('-'))
@@ -44,7 +41,7 @@ public partial class TimeSpanParser : AbstractTypeParser<TimeSpan>
         return ParseFromRegex(matches);
     }
 
-    private static TimeSpan ParseFromRegex(MatchCollection matches)
+    private static Result<TimeSpan> ParseFromRegex(MatchCollection matches)
     {
         var timeSpan = TimeSpan.Zero;
 
@@ -59,7 +56,7 @@ public partial class TimeSpanParser : AbstractTypeParser<TimeSpan>
                 if (!double.TryParse(groupValue, out var parsedGroupValue) ||
                     !int.TryParse(groupValue, out var parsedIntegerValue))
                 {
-                    return TimeSpan.Zero;
+                    return new ArgumentInvalidError(nameof(groupValue), "The input value encountered a parsing error.");
                 }
 
                 var now = DateTimeOffset.UtcNow;