diff --git a/app/assets/minus-square.svg b/app/assets/minus-square.svg
new file mode 100644
index 0000000..86b2981
--- /dev/null
+++ b/app/assets/minus-square.svg
@@ -0,0 +1,3 @@
+<svg width="40" height="40" viewBox="0 0 40 40" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M13.3333 20H26.6667M13 35H27C29.8003 35 31.2004 35 32.27 34.455C33.2108 33.9757 33.9757 33.2108 34.455 32.27C35 31.2004 35 29.8003 35 27V13C35 10.1997 35 8.79961 34.455 7.73005C33.9757 6.78924 33.2108 6.02433 32.27 5.54497C31.2004 5 29.8003 5 27 5H13C10.1997 5 8.79961 5 7.73005 5.54497C6.78924 6.02433 6.02433 6.78924 5.54497 7.73005C5 8.79961 5 10.1997 5 13V27C5 29.8003 5 31.2004 5.54497 32.27C6.02433 33.2108 6.78924 33.9757 7.73005 34.455C8.79961 35 10.1997 35 13 35Z" stroke="#667085" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/app/assets/plus-square.svg b/app/assets/plus-square.svg
new file mode 100644
index 0000000..f9555fc
--- /dev/null
+++ b/app/assets/plus-square.svg
@@ -0,0 +1,3 @@
+<svg width="40" height="40" viewBox="0 0 40 40" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M20 13.3333V26.6667M13.3333 20H26.6667M13 35H27C29.8003 35 31.2004 35 32.27 34.455C33.2108 33.9757 33.9757 33.2108 34.455 32.27C35 31.2004 35 29.8003 35 27V13C35 10.1997 35 8.79961 34.455 7.73005C33.9757 6.78924 33.2108 6.02433 32.27 5.54497C31.2004 5 29.8003 5 27 5H13C10.1997 5 8.79961 5 7.73005 5.54497C6.78924 6.02433 6.02433 6.78924 5.54497 7.73005C5 8.79961 5 10.1997 5 13V27C5 29.8003 5 31.2004 5.54497 32.27C6.02433 33.2108 6.78924 33.9757 7.73005 34.455C8.79961 35 10.1997 35 13 35Z" stroke="#667085" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>
diff --git a/app/routes/_procted+/lectures+/$lectureId+/_layout/TestCaseAddModal.tsx b/app/routes/_procted+/lectures+/$lectureId+/_layout/TestCaseAddModal.tsx
index d18670e..bbb409d 100644
--- a/app/routes/_procted+/lectures+/$lectureId+/_layout/TestCaseAddModal.tsx
+++ b/app/routes/_procted+/lectures+/$lectureId+/_layout/TestCaseAddModal.tsx
@@ -9,8 +9,8 @@ import { postNewTestcase } from "~/API/testCase";
 import { useAuth } from "~/contexts/AuthContext";
 import toast from "react-hot-toast";
 import { useState } from "react";
-import plusW from "~/assets/plus-w.svg";
-import minusW from "~/assets/minus-w.svg";
+import plusW from "~/assets/plus-square.svg";
+import minusW from "~/assets/minus-square.svg";
 
 interface Props {
   isOpen: boolean;
diff --git a/app/routes/_procted+/lectures+/$lectureId+/_layout/TestCaseEditModal.tsx b/app/routes/_procted+/lectures+/$lectureId+/_layout/TestCaseEditModal.tsx
index 5219624..8611efc 100644
--- a/app/routes/_procted+/lectures+/$lectureId+/_layout/TestCaseEditModal.tsx
+++ b/app/routes/_procted+/lectures+/$lectureId+/_layout/TestCaseEditModal.tsx
@@ -15,8 +15,8 @@ import TextInput from "~/components/Input/TextInput";
 import RadioGroup from "~/components/Radio/RadioGroup";
 import TextArea from "~/components/Input/TextArea";
 import toast from "react-hot-toast";
-import plusW from "~/assets/plus-w.svg";
-import minusW from "~/assets/minus-w.svg";
+import plusW from "~/assets/plus-square.svg";
+import minusW from "~/assets/minus-square.svg";
 import trash from "~/assets/trash.svg";
 import download from "~/assets/download.svg";
 import pkg from "file-saver";
@@ -204,20 +204,22 @@ const TestCaseEditModal = ({ isOpen, onClose, testCaseId }: Props) => {
                       className={styles.icon}
                       onClick={async (e) => {
                         e.stopPropagation();
-                        await toast.promise(
-                          deleteFileInputFromTestCase(
-                            testCaseId,
-                            file.name,
-                            auth.token
-                          ),
-                          {
-                            loading: "TC 파일 삭제중...",
-                            success: "TC 파일 삭제완료!",
-                            error: (error) =>
-                              `Error: ${error.message} - ${error.responseMessage}`,
-                          }
-                        );
-                        setIsLoading(true);
+                        if (confirm("TC 파일을 삭제하시겠습니까?")) {
+                          await toast.promise(
+                            deleteFileInputFromTestCase(
+                              testCaseId,
+                              file.name,
+                              auth.token
+                            ),
+                            {
+                              loading: "TC 파일 삭제중...",
+                              success: "TC 파일 삭제완료!",
+                              error: (error) =>
+                                `Error: ${error.message} - ${error.responseMessage}`,
+                            }
+                          );
+                          setIsLoading(true);
+                        }
                       }}
                     >
                       <img src={trash} alt="delete icon" />
diff --git a/app/routes/_procted+/lectures+/$lectureId+/_layout/modal.module.css b/app/routes/_procted+/lectures+/$lectureId+/_layout/modal.module.css
index bf69cda..6b20415 100644
--- a/app/routes/_procted+/lectures+/$lectureId+/_layout/modal.module.css
+++ b/app/routes/_procted+/lectures+/$lectureId+/_layout/modal.module.css
@@ -29,13 +29,11 @@
 .circular-button {
   width: 30px;
   height: 30px;
-  border-radius: 50%;
-  background-color: #756f86;
 }
 
 .circular-button img {
-  width: 100%;
-  height: 100%;
+  width: 30px;
+  height: 30px;
 }
 
 .area {
@@ -63,7 +61,7 @@
 
 .file-row {
   display: flex;
-  height: 20px;
+  height: 30px;
   width: 100%;
   justify-content: space-between;
   align-items: center;