diff --git a/d01/ex04/Sed.cpp b/d01/ex04/Sed.cpp
index b4acbed..b65a350 100644
--- a/d01/ex04/Sed.cpp
+++ b/d01/ex04/Sed.cpp
@@ -22,12 +22,17 @@ void	Sed::replace() {
 	{
 		if (str[0] == this->_find[0])
 		{
-			tmp = str[0];
-			file.get(str, len, EOF);
-			if (this->_find.compare(1, len - 1, str) == 0)
+			if (len == 1)
 				new_file << this->_replacement;
 			else
-				new_file << tmp << str;
+			{
+				tmp = str[0];
+				file.get(str, len, EOF);
+				if (this->_find.compare(1, len - 1, str) == 0)
+					new_file << this->_replacement;
+				else
+					new_file << tmp << str;
+			}
 		}
 		else
 			new_file << str;
diff --git a/d01/ex04/ldksliejf.replace b/d01/ex04/ldksliejf.replace
new file mode 100644
index 0000000..e69de29
diff --git a/d01/ex04/sed b/d01/ex04/sed
index 6ef7124..fabdcbb 100755
Binary files a/d01/ex04/sed and b/d01/ex04/sed differ
diff --git a/d01/ex04/test_log/test1 b/d01/ex04/test_log/test1
new file mode 100644
index 0000000..8d1c8b6
--- /dev/null
+++ b/d01/ex04/test_log/test1
@@ -0,0 +1 @@
+ 
diff --git a/d01/ex04/test_log/test2 b/d01/ex04/test_log/test2
new file mode 100644
index 0000000..23b0c96
--- /dev/null
+++ b/d01/ex04/test_log/test2
@@ -0,0 +1,5 @@
+ce fichier
+contient
+plusieurs lignes
+les unes au dessus des autres
+youhouuu ioieux
diff --git a/d01/ex04/test_log/test3 b/d01/ex04/test_log/test3
new file mode 100644
index 0000000..922f88c
--- /dev/null
+++ b/d01/ex04/test_log/test3
@@ -0,0 +1 @@
+....................................................;
diff --git a/d01/ex04/test_log/test4 b/d01/ex04/test_log/test4
new file mode 100644
index 0000000..0880dee
--- /dev/null
+++ b/d01/ex04/test_log/test4
@@ -0,0 +1,2 @@
+...................................................;
+. . . . . . . . . . . . . . . . . . . . . . . . . .;
diff --git a/d01/ex04/unitests/test.sh b/d01/ex04/unitests/test.sh
index 05c1a55..1fb520a 100644
--- a/d01/ex04/unitests/test.sh
+++ b/d01/ex04/unitests/test.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+cd $(dirname $0)
 source ./colors.sh
 
 mkdir -p test_log
@@ -13,9 +14,9 @@ mkdir -p test_log
 		OUTPUT=$( cat $TESTNAME.replace )
 		if [ "$OUTPUT" == "$RESULT" ]
 		then
-			echo -e $B_GREEN"test1 success"$ENDCO
+			echo -e $B_GREEN"$TESTNAME success"$ENDCO
 		else
-			echo -e $B_RED"test1 faillure"$ENDCO
+			echo -e $B_RED"$TESTNAME faillure"$ENDCO
 		fi
 
 		mv $TESTNAME $TESTNAME.replace ./test_log
@@ -65,7 +66,7 @@ EOF
 )
 run_tests
 
-# TEST 3 ########################################
+# TEST 4 ########################################
 TESTNAME="test4"
 FIND=".."
 REPLACEMENT="++"
@@ -81,3 +82,17 @@ EOF
 )
 run_tests
 
+# TEST 5 ########################################
+TESTNAME="test5"
+FIND="mdr"
+REPLACEMENT="|||"
+CONTENT=$(cat << EOF
+test de mmdr foubar
+EOF
+)
+RESULT=$(cat << EOF
+test de m||| foubar
+EOF
+)
+run_tests
+
diff --git a/d01/ex04/unitests/test_log/test1.replace b/d01/ex04/unitests/test_log/test1.replace
index b6fc4c6..ce01362 100644
--- a/d01/ex04/unitests/test_log/test1.replace
+++ b/d01/ex04/unitests/test_log/test1.replace
@@ -1 +1 @@
-hello
\ No newline at end of file
+hello
diff --git a/d01/ex04/unitests/test_log/test3.replace b/d01/ex04/unitests/test_log/test3.replace
index 9b26e9b..d3b95af 100644
--- a/d01/ex04/unitests/test_log/test3.replace
+++ b/d01/ex04/unitests/test_log/test3.replace
@@ -1 +1 @@
-+
\ No newline at end of file
+++++++++++++++++++++++++++++++++++++++++++++++++++++;
diff --git a/d01/ex04/unitests/test_log/test5 b/d01/ex04/unitests/test_log/test5
new file mode 100644
index 0000000..671f5ed
--- /dev/null
+++ b/d01/ex04/unitests/test_log/test5
@@ -0,0 +1 @@
+test de mmdr foubar
diff --git a/d01/ex04/unitests/test_log/test5.replace b/d01/ex04/unitests/test_log/test5.replace
new file mode 100644
index 0000000..671f5ed
--- /dev/null
+++ b/d01/ex04/unitests/test_log/test5.replace
@@ -0,0 +1 @@
+test de mmdr foubar