diff --git a/Tests/KanaKanjiConverterModuleTests/ConverterTests/TimeExpressionTests.swift b/Tests/KanaKanjiConverterModuleTests/ConverterTests/TimeExpressionTests.swift
index 64b8278..18c9092 100644
--- a/Tests/KanaKanjiConverterModuleTests/ConverterTests/TimeExpressionTests.swift
+++ b/Tests/KanaKanjiConverterModuleTests/ConverterTests/TimeExpressionTests.swift
@@ -2,71 +2,28 @@ import XCTest
 @testable import KanaKanjiConverterModule
 
 final class TimeExpressionTests: XCTestCase {
+    func makeDirectInput(direct input: String) -> ComposingText {
+        ComposingText(
+            convertTargetCursorPosition: input.count,
+            input: input.map {.init(character: $0, inputStyle: .direct)},
+            convertTarget: input
+        )
+    }
+
     func testConvertToTimeExpression() async throws {
         let converter = await KanaKanjiConverter()
 
         // Test 3-digit numbers
-        XCTAssertEqual(converter.convertToTimeExpression(123).first?.text, "1:23")
-        XCTAssertEqual(converter.convertToTimeExpression(945).first?.text, "9:45")
-        XCTAssertEqual(converter.convertToTimeExpression(760).first?.text, "7:60")
-        XCTAssertTrue(converter.convertToTimeExpression(761).isEmpty) // Invalid minute
+        XCTAssertEqual(converter.convertToTimeExpression(makeDirectInput(direct: "123")).first?.text, "1:23")
+        XCTAssertEqual(converter.convertToTimeExpression(makeDirectInput(direct: "945")).first?.text, "9:45")
+        XCTAssertEqual(converter.convertToTimeExpression(makeDirectInput(direct: "760")).first?.text, "7:60")
+        XCTAssertTrue(converter.convertToTimeExpression(makeDirectInput(direct: "761")).isEmpty) // Invalid minute
 
         // Test 4-digit numbers
-        XCTAssertEqual(converter.convertToTimeExpression(1234).first?.text, "12:34")
-        XCTAssertEqual(converter.convertToTimeExpression(9450).first?.text, "09:45")
-        XCTAssertEqual(converter.convertToTimeExpression(7600).first?.text, "07:60")
-        XCTAssertTrue(converter.convertToTimeExpression(1360).isEmpty) // Invalid hour
-        XCTAssertTrue(converter.convertToTimeExpression(1261).isEmpty) // Invalid minute
-    }
-
-    func testToTimeExpressionCandidates() async throws {
-        let converter = await KanaKanjiConverter()
-        var c = ComposingText()
-        
-        // Test 3-digit numbers
-        c.insertAtCursorPosition("123", inputStyle: .direct)
-        var results = await converter.requestCandidates(c, options: ConvertRequestOptions())
-        XCTAssertTrue(results.mainResults.contains(where: {$0.text == "1:23"}))
-        
-        c = ComposingText()
-        c.insertAtCursorPosition("945", inputStyle: .direct)
-        results = await converter.requestCandidates(c, options: ConvertRequestOptions())
-        XCTAssertTrue(results.mainResults.contains(where: {$0.text == "9:45"}))
-        
-        c = ComposingText()
-        c.insertAtCursorPosition("760", inputStyle: .direct)
-        results = await converter.requestCandidates(c, options: ConvertRequestOptions())
-        XCTAssertTrue(results.mainResults.contains(where: {$0.text == "7:60"}))
-        
-        c = ComposingText()
-        c.insertAtCursorPosition("761", inputStyle: .direct)
-        results = await converter.requestCandidates(c, options: ConvertRequestOptions())
-        XCTAssertFalse(results.mainResults.contains(where: {$0.text == "7:61"})) // Invalid minute
-        
-        // Test 4-digit numbers
-        c = ComposingText()
-        c.insertAtCursorPosition("1234", inputStyle: .direct)
-        results = await converter.requestCandidates(c, options: ConvertRequestOptions())
-        XCTAssertTrue(results.mainResults.contains(where: {$0.text == "12:34"}))
-        
-        c = ComposingText()
-        c.insertAtCursorPosition("9450", inputStyle: .direct)
-        results = await converter.requestCandidates(c, options: ConvertRequestOptions())
-        XCTAssertTrue(results.mainResults.contains(where: {$0.text == "09:45"}))
-        
-        c = ComposingText()
-        c.insertAtCursorPosition("7600", inputStyle: .direct)
-        results = await converter.requestCandidates(c, options: ConvertRequestOptions())
-        XCTAssertTrue(results.mainResults.contains(where: {$0.text == "07:60"}))
-        
-        c = ComposingText()
-        c.insertAtCursorPosition("1360", inputStyle: .direct)
-        results = await converter.requestCandidates(c, options: ConvertRequestOptions())
-        XCTAssertFalse(results.mainResults.contains(where: {$0.text == "13:60"})) // Invalid hour
-        
-        c = ComposingText()
-        c.insertAtCursorPosition("1261", inputStyle: .direct)
-        results = await converter.requestCandidates(c, options: ConvertRequestOptions())
-        XCTAssertFalse(results.mainResults.contains(where: {$0.text == "12:61"})) // Invalid minute
+        XCTAssertEqual(converter.convertToTimeExpression(makeDirectInput(direct: "1234")).first?.text, "12:34")
+        XCTAssertEqual(converter.convertToTimeExpression(makeDirectInput(direct: "9450")).first?.text, "09:45")
+        XCTAssertEqual(converter.convertToTimeExpression(makeDirectInput(direct: "7600")).first?.text, "07:60")
+        XCTAssertTrue(converter.convertToTimeExpression(makeDirectInput(direct: "1360")).isEmpty) // Invalid hour
+        XCTAssertTrue(converter.convertToTimeExpression(makeDirectInput(direct: "1261")).isEmpty) // Invalid minute
     }
 }