diff --git a/test/specs/add.book.test.ts b/test/specs/add.book.test.ts
index 56e46d7..d47bd30 100644
--- a/test/specs/add.book.test.ts
+++ b/test/specs/add.book.test.ts
@@ -13,10 +13,16 @@ const data1: Record<string, string> = {
   descriptionText: "This is not a book.",
 };
 
-const dates1: Record<string, string> = {
-  published: "1987\t0615", // in form of keys to type
-  read: "2024\t0425",
-};
+const dates1: Record<string, string> =
+  process.platform === "win32"
+    ? {
+        published: "1987\t0615", // in form of keys to type
+        read: "2024\t0425",
+      }
+    : {
+        published: "06151987",
+        read: "04252024",
+      };
 
 const tags1 = ["Some", "Tags"];
 
diff --git a/test/specs/edit.book.test.ts b/test/specs/edit.book.test.ts
index b1ad41a..85caacf 100644
--- a/test/specs/edit.book.test.ts
+++ b/test/specs/edit.book.test.ts
@@ -29,15 +29,27 @@ const data2: Record<string, string> = {
   notesText: "メモ",
 };
 
-const dates1: Record<string, string> = {
-  published: "2001\t0101", // in form of keys to type
-  read: "2023\t0423",
-};
-
-const dates2: Record<string, string> = {
-  published: "2002\t0602",
-  read: "2024\t0124",
-};
+const dates1: Record<string, string> =
+  process.platform === "win32"
+    ? {
+        published: "2001\t0101", // in form of keys to type
+        read: "2023\t0423",
+      }
+    : {
+        published: "01012001",
+        read: "04232023",
+      };
+
+const dates2: Record<string, string> =
+  process.platform === "win32"
+    ? {
+        published: "2002\t0602",
+        read: "2024\t0124",
+      }
+    : {
+        published: "06022002",
+        read: "01242024",
+      };
 
 const tags1 = ["Non-Fiction", "Art"];
 const tags2 = ["フィクション", "芸術"];