diff --git a/Tests/ScreenUtilTests/SwiftUI/SwiftUIFontEnvironmentTests.swift b/Tests/ScreenUtilTests/SwiftUI/SwiftUIFontEnvironmentTests.swift
index 649e678..c634df2 100644
--- a/Tests/ScreenUtilTests/SwiftUI/SwiftUIFontEnvironmentTests.swift
+++ b/Tests/ScreenUtilTests/SwiftUI/SwiftUIFontEnvironmentTests.swift
@@ -26,7 +26,7 @@ final class SwiftUIFontEnvironmentTests: XCTestCase {
     // MARK: - EnvironmentValues.screenUtil
 
     func testEnvironmentValuesDefaultIsShared() {
-        var env = EnvironmentValues()
+        let env = EnvironmentValues()
         // Default should be ScreenUtil.shared
         let fromEnv = env.screenUtil
         XCTAssertTrue(fromEnv === ScreenUtil.shared)