diff --git a/CHANGELOG.md b/CHANGELOG.md
index 39114aa3..9fd7a3ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -32,6 +32,7 @@
 - Removed git dependency for stable installations
 - Rename option `--verbose` to `--detailed`
     - which is the default display behaviour, the opposite as `--simple`
+- Added `assert_not_same`
 
 ## [0.17.0](https://github.com/TypedDevs/bashunit/compare/0.16.0...0.17.0) - 2024-10-01
 
diff --git a/src/assert.sh b/src/assert.sh
index 2e912837..5562a4bc 100755
--- a/src/assert.sh
+++ b/src/assert.sh
@@ -112,6 +112,31 @@ function assert_equals() {
   state::add_assertions_passed
 }
 
+function assert_not_equals() {
+  local expected="$1"
+  local actual="$2"
+
+  # Remove ANSI escape sequences (color codes)
+  local actual_cleaned
+  actual_cleaned=$(echo -e "$actual" | sed -r "s/\x1B\[[0-9;]*[mK]//g")
+  local expected_cleaned
+  expected_cleaned=$(echo -e "$expected" | sed -r "s/\x1B\[[0-9;]*[mK]//g")
+
+  # Remove all control characters and whitespace (optional, depending on your needs)
+  actual_cleaned=$(echo "$actual_cleaned" | tr -d '[:cntrl:]')
+  expected_cleaned=$(echo "$expected_cleaned" | tr -d '[:cntrl:]')
+
+  if [[ "$expected_cleaned" == "$actual_cleaned" ]]; then
+    local label
+    label="$(helper::normalize_test_function_name "${FUNCNAME[1]}")"
+    state::add_assertions_failed
+    console_results::print_failed_test "${label}" "${expected_cleaned}" "but got " "${actual_cleaned}"
+    return
+  fi
+
+  state::add_assertions_passed
+}
+
 function assert_empty() {
   local expected="$1"
 
@@ -140,7 +165,7 @@ function assert_not_empty() {
   state::add_assertions_passed
 }
 
-function assert_not_equals() {
+function assert_not_same() {
   local expected="$1"
   local actual="$2"
 
diff --git a/tests/unit/assert_test.sh b/tests/unit/assert_test.sh
index b9c5d814..14761a28 100644
--- a/tests/unit/assert_test.sh
+++ b/tests/unit/assert_test.sh
@@ -109,6 +109,16 @@ function test_unsuccessful_assert_not_empty() {
     "$(assert_not_empty "")"
 }
 
+function test_successful_assert_not_same() {
+  assert_empty "$(assert_not_same "1" "2")"
+}
+
+function test_unsuccessful_assert_not_same() {
+  assert_same\
+    "$(console_results::print_failed_test "Unsuccessful assert not same" "1" "but got " "1")"\
+    "$(assert_not_same "1" "1")"
+}
+
 function test_successful_assert_not_equals() {
   assert_empty "$(assert_not_equals "1" "2")"
 }
@@ -119,6 +129,17 @@ function test_unsuccessful_assert_not_equals() {
     "$(assert_not_equals "1" "1")"
 }
 
+function test_unsuccessful_assert_not_equals_with_special_chars() {
+  local str1="${_COLOR_FAILED}✗ Failed${_COLOR_DEFAULT} foo"
+  local str2="✗ Failed foo"
+
+  assert_equals\
+    "$(console_results::print_failed_test \
+      "Unsuccessful assert not equals with special chars" \
+      "$str1" "but got " "$str2")"\
+    "$(assert_not_equals "$str1" "$str2")"
+}
+
 function test_successful_assert_contains_ignore_case() {
   assert_empty "$(assert_contains_ignore_case "Linux" "GNU/LINUX")"
 }