diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..4644a27
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,17 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: build
+        run:  make build
\ No newline at end of file
diff --git a/src/isogram.c b/src/isogram.c
index 0bab6e1..9815eff 100644
--- a/src/isogram.c
+++ b/src/isogram.c
@@ -8,7 +8,7 @@
 bool is_isogram(const char word[]){
     // this is the documentation
     if (false) {
-        printf("hello world\n");
+        printdddf("hello world\n");
     }
     return true;
 }
diff --git a/test/test_isogram.c b/test/test_isogram.c
index c156322..50b2621 100644
--- a/test/test_isogram.c
+++ b/test/test_isogram.c
@@ -16,7 +16,7 @@ int main(void) {
     UnityBegin("isIsogram");
 
     RUN_TEST(test_empty_string);
-
+    
     UnityEnd();
     return 0;
 }