diff --git a/core/src/execution/datafusion/expressions/cast.rs b/core/src/execution/datafusion/expressions/cast.rs
index ca4786435f..d713eec8a1 100644
--- a/core/src/execution/datafusion/expressions/cast.rs
+++ b/core/src/execution/datafusion/expressions/cast.rs
@@ -1516,7 +1516,7 @@ fn date_parser(date_str: &str, eval_mode: EvalMode) -> CometResult<Option<i32>>
     }
 
     fn return_result(date_str: &str, eval_mode: EvalMode) -> CometResult<Option<i32>> {
-        return if eval_mode == EvalMode::Ansi {
+        if eval_mode == EvalMode::Ansi {
             Err(CometError::CastInvalidValue {
                 value: date_str.to_string(),
                 from_type: "STRING".to_string(),
@@ -1524,7 +1524,7 @@ fn date_parser(date_str: &str, eval_mode: EvalMode) -> CometResult<Option<i32>>
             })
         } else {
             Ok(None)
-        };
+        }
     }
     // end local functions
 
@@ -1571,7 +1571,7 @@ fn date_parser(date_str: &str, eval_mode: EvalMode) -> CometResult<Option<i32>>
         } else {
             //increment value of current segment by the next digit
             let parsed_value = (b - b'0') as i32;
-            if parsed_value < 0 || parsed_value > 9 {
+            if !(0..=9).contains(&parsed_value) {
                 return return_result(date_str, eval_mode);
             } else {
                 current_segment_value = current_segment_value * 10 + parsed_value;
@@ -1593,7 +1593,7 @@ fn date_parser(date_str: &str, eval_mode: EvalMode) -> CometResult<Option<i32>>
 
     date_segments[current_segment as usize] = current_segment_value;
 
-    return match NaiveDate::from_ymd_opt(
+    match NaiveDate::from_ymd_opt(
         sign * date_segments[0],
         date_segments[1] as u32,
         date_segments[2] as u32,
@@ -1603,7 +1603,7 @@ fn date_parser(date_str: &str, eval_mode: EvalMode) -> CometResult<Option<i32>>
             Ok(Some(duration_since_epoch.to_i32().unwrap()))
         }
         None => Ok(None),
-    };
+    }
 }
 
 #[cfg(test)]
diff --git a/spark/src/test/scala/org/apache/comet/CometCastSuite.scala b/spark/src/test/scala/org/apache/comet/CometCastSuite.scala
index fe3c4f5532..d09d8c9513 100644
--- a/spark/src/test/scala/org/apache/comet/CometCastSuite.scala
+++ b/spark/src/test/scala/org/apache/comet/CometCastSuite.scala
@@ -49,7 +49,6 @@ class CometCastSuite extends CometTestBase with AdaptiveSparkPlanHelper {
    */
   private val numericPattern = "0123456789deEf+-." + whitespaceChars
 
-  private val datePattern = "0123456789/" + whitespaceChars
   private val timestampPattern = "0123456789/:T" + whitespaceChars
 
   test("all valid cast combinations covered") {