diff --git a/src/assert.sh b/src/assert.sh
index 8d3bef10..8fa00ef7 100755
--- a/src/assert.sh
+++ b/src/assert.sh
@@ -318,21 +318,23 @@ function assert_greater_or_equal_than() {
 
 function assert_line_count() {
   local expected="$1"
-  local actual="$2"
+  local input_str="$2"
   local label="${3:-$(helper::normalize_test_function_name "${FUNCNAME[1]}")}"
 
-  if [ -z "$actual" ]; then
-    local actual_line_count=0
+  if [ -z "$input_str" ]; then
+    local actual=0
   else
-    local actual_line_count
-    actual_line_count=$(echo "$actual" | wc -l | tr -d '[:blank:]')
+    local actual
+    actual=$(echo "$input_str" | wc -l | tr -d '[:blank:]')
+    additional_new_lines=$(grep -o '\\n' <<< "$input_str" | wc -l | tr -d '[:blank:]')
+    ((actual+=additional_new_lines))
   fi
 
-  if [[ "$expected" != "$actual_line_count" ]]; then
+  if [[ "$expected" != "$actual" ]]; then
     state::add_assertions_failed
-    console_results::print_failed_test "${label}" "${actual}"\
+    console_results::print_failed_test "${label}" "${input_str}"\
       "to contain number of lines equal to" "${expected}"\
-      "but found" "${actual_line_count}"
+      "but found" "${actual}"
     return
   fi
 
diff --git a/tests/unit/assert_test.sh b/tests/unit/assert_test.sh
index 2939caca..4b6d886e 100644
--- a/tests/unit/assert_test.sh
+++ b/tests/unit/assert_test.sh
@@ -334,15 +334,34 @@ function test_unsuccessful_assert_equals_ignore_colors() {
     "$(assert_equals_ignore_colors "$string" "$string")"
 }
 
-function test_successful_assert_line_count() {
-  local one_line_string="one line"
-  local multi_line_string="this is line one
+function test_successful_assert_line_count_empty_str() {
+  assert_empty "$(assert_line_count 0 "")"
+}
+
+function test_successful_assert_line_count_one_line() {
+  assert_empty "$(assert_line_count 1 "one line")"
+}
+
+function test_successful_assert_count_multiline() {
+  local multiline_string="this is line one
   this is line two
   this is line three"
 
-  assert_empty "$(assert_line_count 0 "")"
-  assert_empty "$(assert_line_count 1 "$one_line_string")"
-  assert_empty "$(assert_line_count 3 "$multi_line_string")"
+  assert_empty "$(assert_line_count 3 "$multiline_string")"
+}
+
+function test_successful_assert_line_count_multiline_string_in_one_line() {
+  assert_empty "$(assert_line_count 4 "one\ntwo\nthree\nfour")"
+}
+
+function test_successful_assert_line_count_multiline_with_new_lines() {
+  local multiline_str="this \n is \n a multiline \n in one
+  \n
+  this is line 7
+  this is \n line nine
+  "
+
+  assert_empty "$(assert_line_count 10 "$multiline_str")"
 }
 
 function test_unsuccessful_assert_line_count() {