diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 00000000..d48eca1f
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,10 @@
+root = true
+
+[*.sh]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+
+trim_trailing_whitespace = true
\ No newline at end of file
diff --git a/README.md b/README.md
index 239d04a5..cdb52244 100644
--- a/README.md
+++ b/README.md
@@ -49,5 +49,5 @@ To update a git-submodule is as simple as:
    
 ### Run test from the library
 ```bash
-./bashunit ./tests/**/* 
+./bashunit ./tests/**/*.sh 
 ```
\ No newline at end of file
diff --git a/example/tools/bashunit b/example/tools/bashunit
index c3b63b7a..bc35c410 160000
--- a/example/tools/bashunit
+++ b/example/tools/bashunit
@@ -1 +1 @@
-Subproject commit c3b63b7a97347a11318a0cc7fbbe1e2ec53df977
+Subproject commit bc35c4108b60102a7ea427762c6000bec3024467
diff --git a/src/assert.sh b/src/assert.sh
index da6bdc4d..1c6ac611 100755
--- a/src/assert.sh
+++ b/src/assert.sh
@@ -3,6 +3,7 @@
 export TEST=true
 
 export assertEquals
+export assertContains
 
 TOTAL_TESTS=0
 FAILED=false
@@ -37,6 +38,23 @@ assertEquals() {
     printf "✔️  ${COLOR_PASSED}Passed${COLOR_DEFAULT}: %s\\n" "$label"
   fi
 }
+assertContains() {
+  local expected="$1"
+  local actual="$2"
+  local label="${3:-$(transformTestFunctionName ${FUNCNAME[1]})}"
+
+  case "$actual" in
+    *"$expected"*)
+      ((TOTAL_TESTS++))
+      printf "✔️  ${COLOR_PASSED}Passed${COLOR_DEFAULT}: %s\\n" "$label"
+      ;;
+    *)
+      FAILED=true
+      printf "❌  ${COLOR_FAILED}Failed${COLOR_DEFAULT}: %s\\n Expected   '%s'\\n to contain '%s'\\n" "$label" "$actual" "$expected"
+      exit 1
+      ;;
+  esac
+}
 
 renderResult() {
   echo ""
diff --git a/tests/unit/assert_test.sh b/tests/unit/assert_test.sh
index af04fd89..bbee63e8 100644
--- a/tests/unit/assert_test.sh
+++ b/tests/unit/assert_test.sh
@@ -13,3 +13,13 @@ function test_unsuccessful_assertEquals() {
 function testCamelCase() {
   assertEquals "$(printf "✔️  ${COLOR_PASSED}Passed${COLOR_DEFAULT}: CamelCase")" "$(assertEquals "1" "1")"
 }
+
+function test_successful_assertContains() {
+  assertEquals "$(printf "✔️  ${COLOR_PASSED}Passed${COLOR_DEFAULT}: Successful assertContains")" "$(assertContains "Linux" "GNU/Linux")"
+}
+
+function test_unsuccessful_assertContains() {
+  assertEquals "$(printf "❌  ${COLOR_FAILED}Failed${COLOR_DEFAULT}: Unsuccessful assertContains
+ Expected   'GNU/Linux'
+ to contain 'Unix'")" "$(assertContains "Unix" "GNU/Linux")"
+}