diff --git a/swad_changelog.h b/swad_changelog.h
index b734028f6..f2814ad9c 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -144,14 +144,14 @@
 /****************************** Public constants *****************************/
 /*****************************************************************************/
 
-#define Log_PLATFORM_VERSION	"SWAD 15.173.3 (2016-04-01)"
+#define Log_PLATFORM_VERSION	"SWAD 15.173.4 (2016-04-01)"
 #define CSS_FILE		"swad15.173.1.css"
 #define JS_FILE			"swad15.131.3.js"
 
 // Number of lines (includes comments but not blank lines) has been got with the following command:
 // nl swad*.c swad*.h css/swad*.css py/swad*.py js/swad*.js soap/swad*.h sql/swad*.sql | tail -1
 /*
-        Version 15.173.4: Apr 01, 2016	Old image in test question is removed when replaced by a new one. (? lines)
+        Version 15.173.4: Apr 01, 2016	Old image in test question is removed when replaced by a new one. (197481 lines)
         Version 15.173.3: Apr 01, 2016	Changes in layout of class photo. (197447 lines)
         Version 15.173.2: Apr 01, 2016	Changes in CSS related to tests. (197446 lines)
         Version 15.173.1: Apr 01, 2016	Changes in CSS related to tests. (197452 lines)
diff --git a/swad_test.c b/swad_test.c
index b12f56250..c0ddad17c 100644
--- a/swad_test.c
+++ b/swad_test.c
@@ -222,6 +222,7 @@ static void Tst_EnableOrDisableTag (long TagCod,bool TagHidden);
 static int Tst_GetQstCod (void);
 
 static void Tst_InsertOrUpdateQstIntoDB (void);
+static void Tst_RemoveImageFileCurrentQst (void);
 static void Tst_InsertTagsIntoDB (void);
 static void Tst_InsertAnswersIntoDB (void);
 
@@ -4814,7 +4815,7 @@ static void Tst_GetQstFromForm (char *Stem,char *Feedback)
    /***** Get question feedback *****/
    Par_GetParToHTML ("Feedback",Feedback,Cns_MAX_BYTES_TEXT);
 
-   /***** Get image *****/
+   /***** Get new image (if present ==> create file) *****/
    Gbl.Test.ChangeImage = Tst_GetImageFromForm ();
 
    /***** Get answers *****/
@@ -5481,6 +5482,11 @@ static void Tst_InsertOrUpdateQstIntoDB (void)
      {
       /* Update question */
       if (Gbl.Test.ChangeImage)
+	{
+	 /* Remove file with the current image */
+	 Tst_RemoveImageFileCurrentQst ();
+
+	 /* Update question in database */
 	 sprintf (Query,"UPDATE tst_questions"
 			" SET EditTime=NOW(),AnsType='%s',Shuffle='%c',"
 			"Stem='%s',Image='%s',Feedback='%s'"
@@ -5492,6 +5498,7 @@ static void Tst_InsertOrUpdateQstIntoDB (void)
 		  Gbl.Test.Image,
 		  Gbl.Test.Feedback.Text ? Gbl.Test.Feedback.Text : "",
 		  Gbl.Test.QstCod,Gbl.CurrentCrs.Crs.CrsCod);
+	}
       else
 	 sprintf (Query,"UPDATE tst_questions"
 			" SET EditTime=NOW(),AnsType='%s',Shuffle='%c',"
@@ -5514,6 +5521,40 @@ static void Tst_InsertOrUpdateQstIntoDB (void)
    free ((void *) Query);
   }
 
+/*****************************************************************************/
+/**************** Remove the current image of a test question ****************/
+/*****************************************************************************/
+
+static void Tst_RemoveImageFileCurrentQst (void)
+  {
+   char Query[256];
+   MYSQL_RES *mysql_res;
+   MYSQL_ROW row;
+   char FullPathImgPriv[PATH_MAX+1];
+
+   /***** Get name of image associated to test question from database *****/
+   sprintf (Query,"SELECT Image FROM tst_questions"
+		  " WHERE QstCod='%ld' AND CrsCod='%ld'",
+            Gbl.Test.QstCod,Gbl.CurrentCrs.Crs.CrsCod);
+   if (DB_QuerySELECT (Query,&mysql_res,"can not get test image"))
+     {
+      row = mysql_fetch_row (mysql_res);
+
+      /***** Get image name (row[0]) *****/
+      sprintf (FullPathImgPriv,"%s/%s/%c%c/%s.jpg",
+	       Cfg_PATH_SWAD_PRIVATE,Cfg_FOLDER_IMG,
+	       row[0][0],
+	       row[0][1],
+	       row[0]);
+
+      /***** Remove file *****/
+      unlink (FullPathImgPriv);
+     }
+
+   /***** Free structure that stores the query result *****/
+   DB_FreeMySQLResult (&mysql_res);
+  }
+
 /*****************************************************************************/
 /*********************** Insert tags in the tags table ***********************/
 /*****************************************************************************/