diff --git a/app/src/androidTestKiwix/java/org/kiwix/kiwixmobile/utils/files/FileUtilsInstrumentationTest.java b/app/src/androidTestKiwix/java/org/kiwix/kiwixmobile/utils/files/FileUtilsInstrumentationTest.java
index 14dcc012e..98f5e502c 100644
--- a/app/src/androidTestKiwix/java/org/kiwix/kiwixmobile/utils/files/FileUtilsInstrumentationTest.java
+++ b/app/src/androidTestKiwix/java/org/kiwix/kiwixmobile/utils/files/FileUtilsInstrumentationTest.java
@@ -32,7 +32,7 @@ public class FileUtilsInstrumentationTest {
     // Filename ends with .zimXX and the files up till "FileName.zimer" exist
     // i.e. 26 * 4 + 18 = 122 files exist
     String testId = "2rs5475f-51h7-vbz6-331b-7rr25r58251s";
-    String fileName = "/" + testId + "testfile.zim";
+    String fileName = testDir.getPath() + "/" + testId + "testfile.zim";
     String fileNameWithExtension;
     Random r = new Random();
     boolean bool[] = new boolean[122];
@@ -45,7 +45,7 @@ public class FileUtilsInstrumentationTest {
         fileNameWithExtension = fileName + char1 + char2;
         fileNameWithExtension =
             bool[index] ? fileNameWithExtension : fileNameWithExtension + ".part";
-        File file = new File(testDir.getPath() + fileNameWithExtension);
+        File file = new File(fileNameWithExtension);
         file.createNewFile();
         if (char1 == 'e' && char2 == 'r') {
           break;
@@ -58,7 +58,7 @@ public class FileUtilsInstrumentationTest {
     }
 
     Book book = new Book();
-    book.file = new File(testDir.getPath() + fileName + "bg");
+    book.file = new File(fileName + "bg");
     
     List<File> files = FileUtils.getAllZimParts(book);
 
@@ -79,35 +79,35 @@ public class FileUtilsInstrumentationTest {
   @Test
   public void testHasPart() throws IOException {
     String testId = "3yd5474g-55d1-aqw0-108z-1xp69x25260d";
-    String baseName = "/" + testId + "testFile";
+    String baseName = testDir.getPath() + "/" + testId + "testFile";
 
     // FileName ends with .zim
-    File file1 = new File(testDir + baseName + "1" + ".zim");
+    File file1 = new File(baseName + "1" + ".zim");
     file1.createNewFile();
     assertEquals("if the fileName ends with .zim and exists in memory, return false",
         false, FileUtils.hasPart(file1));
 
     // FileName ends with .part
-    File file2 = new File(testDir + baseName + "2" + ".zim");
+    File file2 = new File(baseName + "2" + ".zim");
     file2.createNewFile();
     assertEquals("if the fileName ends with .part and exists in memory, return true",
         false, FileUtils.hasPart(file2));
 
     // FileName ends with .zim, however, only the FileName.zim.part file exists in memory
-    File file3 = new File(testDir + baseName + "3" + ".zim" + ".part");
+    File file3 = new File(baseName + "3" + ".zim" + ".part");
     file3.createNewFile();
-    File file4 = new File(testDir + baseName + "3" + ".zim");
+    File file4 = new File(baseName + "3" + ".zim");
     assertEquals("if the fileName ends with .zim, but instead the .zim.part file exists in memory",
         true, FileUtils.hasPart(file4));
 
     // FileName ends with .zimXX
-    File testCall = new File(testDir + baseName + ".zimcj");
+    File testCall = new File(baseName + ".zimcj");
     testCall.createNewFile();
 
     // Case : FileName.zimXX.part does not exist for any value of "XX" from "aa" till "bl", but FileName.zimXX exists for all "XX" from "aa', till "bk", then it does not exist
     for (char char1 = 'a'; char1 <= 'z'; char1++) {
       for (char char2 = 'a'; char2 <= 'z'; char2++) {
-        File file = new File(testDir.getPath() + baseName + ".zim" + char1 + char2);
+        File file = new File(baseName + ".zim" + char1 + char2);
         file.createNewFile();
         if (char1 == 'b' && char2 == 'k') {
           break;
@@ -122,12 +122,12 @@ public class FileUtilsInstrumentationTest {
 
     // Case : FileName.zim is the calling file, but neither FileName.zim, nor FileName.zim.part exist
     // In this case the answer will be the same as that in the previous (FileName.zimXX) case
-    File testCall2 = new File(testDir.getPath() + baseName + ".zim");
+    File testCall2 = new File(baseName + ".zim");
     assertEquals(false, FileUtils.hasPart(testCall2));
 
     // Case : FileName.zimXX.part exists for some "XX" between "aa" till "bl"
     // And FileName.zimXX exists for all "XX" from "aa', till "bk", and then it does not exist
-    File t = new File(testDir + baseName + ".zimaj.part");
+    File t = new File(baseName + ".zimaj.part");
     t.createNewFile();
     assertEquals(true, FileUtils.hasPart(testCall));