diff --git a/.github/workflows/code_style.yaml b/.github/workflows/code_style.yaml
index cdb96837c33..02da7b79b69 100644
--- a/.github/workflows/code_style.yaml
+++ b/.github/workflows/code_style.yaml
@@ -100,7 +100,7 @@ jobs:
           git diff --exit-code
 
   misc_checks:
-    name: Check license, update scripts, git hooks and missing gitignore entries
+    name: Check license, update scripts, git hooks, missing gitignore entries and unecessary template tests
     runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
@@ -124,3 +124,7 @@ jobs:
     - name: Check for missing gitignore entries for template test files
       if: always()
       run: ./scripts/check_missing_gitignore_for_template_tests.sh
+    - name: Check for unecessary template test files
+      if: always()
+      run: ./scripts/check_unecessary_template_tests.sh
+
diff --git a/scripts/check_unecessary_template_tests.sh b/scripts/check_unecessary_template_tests.sh
new file mode 100755
index 00000000000..07c84f616e0
--- /dev/null
+++ b/scripts/check_unecessary_template_tests.sh
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+ERROR=0
+
+for FILE in $(git ls-files test/sql/*.sql.in tsl/test/sql/*.sql.in)
+do
+  DIRNAME=$(dirname "${FILE}" | sed 's/sql/expected/g')
+  TESTNAME=$(basename "${FILE}" .sql.in)
+
+  if diff --from-file ${DIRNAME}/${TESTNAME}-*.out > /dev/null 2>&1; then
+      echo "ERROR: all template output test files are equal: \"${DIRNAME}/${TESTNAME}-*.out\""
+      echo "HINT: Please turn template test file \"${FILE}\" into a regular test file"
+      ERROR=1
+  fi
+done
+
+exit ${ERROR}