diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 894ddd4..55adc4d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -146,35 +146,6 @@ jobs:
           cd tests
           bash ./run.sh ${{ matrix.compiler }} v${{ matrix.version }} 32
 
-  tests-macos11-gpp:
-    strategy:
-      matrix:
-        os: [macos-11]
-        compiler: [g++]
-        version: [10, 11, 12]
-    name: Use ${{ matrix.compiler }}-${{ matrix.version }} on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    steps:
-      - uses: actions/checkout@v3
-      - name: Run tests
-        run: |
-          cd tests
-          bash ./run.sh ${{ matrix.compiler }} v${{ matrix.version }}
-
-  tests-macos11-clang:
-    strategy:
-      matrix:
-        os: [macos-11]
-        compiler: [clang++]
-    name: Use ${{ matrix.compiler }} on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-    steps:
-      - uses: actions/checkout@v3
-      - name: Run tests
-        run: |
-          cd tests
-          bash ./run.sh ${{ matrix.compiler }}
-
   tests-macos12-gpp:
     strategy:
       matrix:
diff --git a/tests/test-008_format/files/test-format.cpp b/tests/test-008_format/files/test-format.cpp
new file mode 100644
index 0000000..19da939
--- /dev/null
+++ b/tests/test-008_format/files/test-format.cpp
@@ -0,0 +1,14 @@
+#include "testlib.h"
+
+using namespace std;
+
+int main(int argc, char** argv) {
+    registerGen(argc, argv, 1);
+    
+    println(format("%d", 42));
+    println(format("hello, %s!", "hat"));
+    println(format("%s%d!", "'hat'", 42));
+    println(format("%s%d!", "'%s'", 42));
+
+    ensure(format("%f", 42.5).substr(0, 4) == "42.5");
+}
diff --git a/tests/test-008_format/refs/test-format/r1/exit_code b/tests/test-008_format/refs/test-format/r1/exit_code
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/test-008_format/refs/test-format/r1/exit_code
@@ -0,0 +1 @@
+0
diff --git a/tests/test-008_format/refs/test-format/r1/stderr b/tests/test-008_format/refs/test-format/r1/stderr
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test-008_format/refs/test-format/r1/stdout b/tests/test-008_format/refs/test-format/r1/stdout
new file mode 100644
index 0000000..e0f278f
--- /dev/null
+++ b/tests/test-008_format/refs/test-format/r1/stdout
@@ -0,0 +1,4 @@
+42
+hello, hat!
+'hat'42!
+'%s'42!
diff --git a/tests/test-008_format/refs/test-format/r2/exit_code b/tests/test-008_format/refs/test-format/r2/exit_code
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/test-008_format/refs/test-format/r2/exit_code
@@ -0,0 +1 @@
+0
diff --git a/tests/test-008_format/refs/test-format/r2/stderr b/tests/test-008_format/refs/test-format/r2/stderr
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test-008_format/refs/test-format/r2/stdout b/tests/test-008_format/refs/test-format/r2/stdout
new file mode 100644
index 0000000..e0f278f
--- /dev/null
+++ b/tests/test-008_format/refs/test-format/r2/stdout
@@ -0,0 +1,4 @@
+42
+hello, hat!
+'hat'42!
+'%s'42!
diff --git a/tests/test-008_format/run.sh b/tests/test-008_format/run.sh
new file mode 100644
index 0000000..e7aaf4f
--- /dev/null
+++ b/tests/test-008_format/run.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+set -eo pipefail
+
+bash ../scripts/compile files/test-format.cpp
+bash ../scripts/test-ref test-format/r1 ./test-format
+bash ../scripts/test-ref test-format/r2 "$VALGRIND" ./test-format
+rm -f test-format test-format.exe