diff --git a/Source/Turbo/Navigator/Helpers/Navigation.swift b/Source/Turbo/Navigator/Helpers/Navigation.swift
index c911fa6..599013c 100644
--- a/Source/Turbo/Navigator/Helpers/Navigation.swift
+++ b/Source/Turbo/Navigator/Helpers/Navigation.swift
@@ -18,7 +18,7 @@ public enum Navigation {
         case medium
         case large
         case full
-        case pageSheet
-        case formSheet
+        case pageSheet = "page_sheet"
+        case formSheet = "form_sheet"
     }
 }
diff --git a/Tests/Hotwire/HotwireTests.swift b/Tests/Hotwire/HotwireTests.swift
deleted file mode 100644
index 0be57c3..0000000
--- a/Tests/Hotwire/HotwireTests.swift
+++ /dev/null
@@ -1,12 +0,0 @@
-@testable import HotwireNative
-import XCTest
-
-final class HotwireTests: XCTestCase {
-    func testExample() throws {
-        // XCTest Documentation
-        // https://developer.apple.com/documentation/xctest
-
-        // Defining Test Cases and Test Methods
-        // https://developer.apple.com/documentation/xctest/defining_test_cases_and_test_methods
-    }
-}
diff --git a/Tests/Turbo/Fixtures/test-modal-styles-configuration.json b/Tests/Turbo/Fixtures/test-modal-styles-configuration.json
index 06e8f96..e729aad 100644
--- a/Tests/Turbo/Fixtures/test-modal-styles-configuration.json
+++ b/Tests/Turbo/Fixtures/test-modal-styles-configuration.json
@@ -44,7 +44,7 @@
       ],
       "properties":{
         "context":"modal",
-        "modal_style":"pageSheet"
+        "modal_style":"page_sheet"
       }
     },
     {
@@ -53,7 +53,7 @@
       ],
       "properties":{
         "context":"modal",
-        "modal_style":"formSheet"
+        "modal_style":"form_sheet"
       }
     }
   ]
diff --git a/Tests/Turbo/Navigator/NavigationHierarchyControllerTests.swift b/Tests/Turbo/Navigator/NavigationHierarchyControllerTests.swift
index c88e015..8ede16a 100644
--- a/Tests/Turbo/Navigator/NavigationHierarchyControllerTests.swift
+++ b/Tests/Turbo/Navigator/NavigationHierarchyControllerTests.swift
@@ -327,7 +327,7 @@ final class NavigationHierarchyControllerTests: XCTestCase {
             path: "/new",
             context: .modal,
             additionalProperties: [
-                "modal_style": "formSheet"
+                "modal_style": "form_sheet"
             ])
         navigator.route(proposal)
         XCTAssertEqual(modalNavigationController.modalPresentationStyle, .formSheet)
@@ -339,9 +339,16 @@ final class NavigationHierarchyControllerTests: XCTestCase {
             context: .modal
         )
         navigator.route(proposal)
-        // NOTE: For most view controllers, UIKit maps `automatic` style to the UIModalPresentationStyle.pageSheet style,
-        // but some system view controllers may map it to a different style.
-        XCTAssertEqual(modalNavigationController.modalPresentationStyle, .pageSheet)
+        // For most view controllers, UIKit maps [automatic] to:
+        // UIModalPresentationStyle.formSheet in iOS 18 and later
+        // UIModalPresentationStyle.pageSheet in versions of iOS earlier than iOS 18
+        // Some system view controllers may map it to a different style.
+        // https://developer.apple.com/documentation/uikit/uimodalpresentationstyle/automatic
+        if #available(iOS 18, *) {
+            XCTAssertEqual(modalNavigationController.modalPresentationStyle, .formSheet)
+        } else {
+            XCTAssertEqual(modalNavigationController.modalPresentationStyle, .pageSheet)
+        }
     }
 
     func test_modalDismissGestureEnabled_isCorrectlySet() throws {