diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index ce538ef..4b74612 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -38,11 +38,17 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        directory:
-          - ./test_dir/project1
-          - ./test_dir/project2
-          - ./test_dir/project3
-          - ./test_dir/project4
+        include:
+          - directory: ./test_dir/project1
+            terraform_version: 0.15.0
+          - directory: ./test_dir/project2
+            terraform_version: 1.3.3
+          - directory: ./test_dir/project3/applications/backend-app
+            terraform_version: 1.2.1
+          - directory: ./test_dir/project3/applications/frontend-app
+            terraform_version: 1.4.1
+          - directory: ./test_dir/project4
+            terraform_version: 1.6.1
     defaults:
       run:
         working-directory: ${{ matrix.directory }}
@@ -59,11 +65,17 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        directory:
-          - ./test_dir/project1
-          - ./test_dir/project2
-          - ./test_dir/project3
-          - ./test_dir/project4
+        include:
+          - directory: ./test_dir/project1
+            terraform_version: 0.15.0
+          - directory: ./test_dir/project2
+            terraform_version: 1.3.3
+          - directory: ./test_dir/project3/applications/backend-app
+            terraform_version: 1.2.1
+          - directory: ./test_dir/project3/applications/frontend-app
+            terraform_version: 1.4.1
+          - directory: ./test_dir/project4
+            terraform_version: 1.6.1
     defaults:
       run:
         working-directory: ${{ matrix.directory }}
@@ -81,11 +93,17 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        directory:
-          - ./test_dir/project1
-          - ./test_dir/project2
-          - ./test_dir/project3
-          - ./test_dir/project4
+        include:
+          - directory: ./test_dir/project1
+            terraform_version: 0.15.0
+          - directory: ./test_dir/project2
+            terraform_version: 1.3.3
+          - directory: ./test_dir/project3/applications/backend-app
+            terraform_version: 1.2.1
+          - directory: ./test_dir/project3/applications/frontend-app
+            terraform_version: 1.4.1
+          - directory: ./test_dir/project4
+            terraform_version: 1.6.1
     defaults:
       run:
         working-directory: ${{ matrix.directory }}
diff --git a/test_dir/project1/main.tf b/test_dir/project1/main.tf
index 94771f7..ac78e3f 100644
--- a/test_dir/project1/main.tf
+++ b/test_dir/project1/main.tf
@@ -1,5 +1,5 @@
 terraform {
-  required_version = "<=0.15"
+  required_version = "<~0.15"
 }
 
 module "gcp" {