diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..59fd7dc
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,24 @@
+name: CI/CD
+
+on: [push]
+
+jobs:
+  code-tests:
+    strategy:
+      matrix:
+        platform: [x86, x64]
+        os: [ubuntu-latest]
+    runs-on: '${{ matrix.os }}'
+    name: 'Test: ${{ matrix.os }} / ${{ matrix.platform }}'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set up GCC
+        uses: ./
+        with:
+          platform: '${{ matrix.platform }}'
+          cc: 1
+    - name: tests
+      run: |
+        chmod +x ./tests/test.sh
+        ./tests/test.sh
\ No newline at end of file
diff --git a/Utils/TestUtils.h b/Utils/TestUtils.h
index ce85828..29d7fd6 100644
--- a/Utils/TestUtils.h
+++ b/Utils/TestUtils.h
@@ -19,7 +19,7 @@
         if (_a == _b) { \
             printf("."); \
         } else { \
-            printf("F"); \
+            printf("[F]"); \
             printf("\n\n%s - %i: ", __FILE__, __LINE__); \
             printf(t1, a); printf(" != "); printf(t2, b); printf("\n"); \
             return 0; } \
@@ -28,10 +28,12 @@
 #define ASSERT_EQUALS_WITH_DELTA(a, b, delta, t1, t2) \
     ({ __typeof__ (a) _a = (a); \
         __typeof__ (b) _b = (b); \
-        if (oms_abs(_a - _b) <= delta) { \
+        __typeof__ (delta) _delta = (delta); \
+        __typeof__ (delta) _d = (_a - _b); \
+        if (oms_abs(_d) <= _delta) { \
             printf("."); \
         } else { \
-            printf("F"); \
+            printf("[F]"); \
             printf("\n\n%s - %i: ", __FILE__, __LINE__); \
             printf(t1, a); printf(" != "); printf(t2, b); printf("\n"); \
             return 0; } \
diff --git a/tests/Image/ImageUtilsTest.cpp b/tests/Image/ImageUtilsTest.cpp
index b1661fa..95b9d8e 100644
--- a/tests/Image/ImageUtilsTest.cpp
+++ b/tests/Image/ImageUtilsTest.cpp
@@ -25,7 +25,7 @@ int main(int argc, char** argv)
     ASSERT_EQUALS(black, 0.0, "%f", "%f");
 
     float other = Image::ImageUtils::lightnessFromRgb(125, 125, 125);
-    ASSERT_EQUALS_WITH_DELTA(other, 0.524, 0.001, "%f", "%f");
+    ASSERT_EQUALS_WITH_DELTA(other, 0.524, 0.01, "%f", "%f");
 
     printf("\n\n");
 
diff --git a/tests/test.sh b/tests/test.sh
index 974ca29..7f213b1 100755
--- a/tests/test.sh
+++ b/tests/test.sh
@@ -1,3 +1,5 @@
 #!/bin/bash
 
-g++ Image/ImageUtilsTest.cpp -o Image/ImageUtilsTest && ./Image/ImageUtilsTest && rm Image/ImageUtilsTest
\ No newline at end of file
+BASEDIR=$(dirname "$(readlink -f "$0")")
+
+g++ $BASEDIR/Image/ImageUtilsTest.cpp -o $BASEDIR/Image/ImageUtilsTest && $BASEDIR/Image/ImageUtilsTest && rm $BASEDIR/Image/ImageUtilsTest
\ No newline at end of file