diff --git a/src/gcc/__tests__/gcc.test.ts b/src/gcc/__tests__/gcc.test.ts
index d3eba8e2..68551c69 100644
--- a/src/gcc/__tests__/gcc.test.ts
+++ b/src/gcc/__tests__/gcc.test.ts
@@ -1,6 +1,10 @@
 import { testBin } from "../../utils/tests/test-helpers"
 import { setupGcc } from "../gcc"
 import { getVersion } from "../../default_versions"
+import path from "path"
+import execa from "execa"
+import { addBinExtension } from "../../utils/extension/extension"
+import { chmodSync } from "fs"
 
 jest.setTimeout(3000000)
 describe("setup-gcc", () => {
@@ -16,5 +20,14 @@ describe("setup-gcc", () => {
 
     expect(process.env.CC?.includes("gcc")).toBeTruthy()
     expect(process.env.CXX?.includes("g++")).toBeTruthy()
+
+    // test compilation
+    const file = path.join(__dirname, "main.cpp")
+    const main_exe = path.join(__dirname, addBinExtension("main"))
+    execa.sync("g++", [file, "-o", main_exe], { cwd: __dirname })
+    if (process.platform !== "win32") {
+      chmodSync(main_exe, "755")
+    }
+    execa.sync(main_exe, { cwd: __dirname, stdio: "inherit" })
   })
 })
diff --git a/src/gcc/__tests__/main.cpp b/src/gcc/__tests__/main.cpp
new file mode 100644
index 00000000..f3ac3e8a
--- /dev/null
+++ b/src/gcc/__tests__/main.cpp
@@ -0,0 +1,18 @@
+// test std libraries
+#include <iostream>
+#include <string>
+
+// test c libraries
+#include <cassert>
+#include <cctype>
+#include <cstddef>
+#include <cstdint>
+#include <cstring>
+
+int main() {
+    const auto x = 10.0;
+    std::cout << "Testing " << x << '\n';
+
+    const auto y = std::to_string(x);
+    std::cout << "Testing " << y << '\n';
+}
diff --git a/src/llvm/__tests__/llvm.test.ts b/src/llvm/__tests__/llvm.test.ts
index 8131b355..c526494d 100644
--- a/src/llvm/__tests__/llvm.test.ts
+++ b/src/llvm/__tests__/llvm.test.ts
@@ -3,6 +3,10 @@ import { getSpecificVersionAndUrl } from "../../utils/setup/version"
 import { isValidUrl } from "../../utils/http/validate_url"
 import { setupTmpDir, cleanupTmpDir, testBin } from "../../utils/tests/test-helpers"
 import { isGitHubCI } from "../../utils/env/isci"
+import execa from "execa"
+import path from "path"
+import { addBinExtension } from "../../utils/extension/extension"
+import { chmodSync } from "fs"
 
 jest.setTimeout(400000)
 async function testUrl(version: string) {
@@ -22,6 +26,7 @@ describe("setup-llvm", () => {
   it("Finds valid LLVM URLs", async () => {
     await Promise.all(
       [
+        "13.0.0",
         "12.0.0",
         "12",
         "11",
@@ -43,15 +48,24 @@ describe("setup-llvm", () => {
   })
 
   it("should setup LLVM", async () => {
-    const { binDir } = await setupLLVM("11.0.0", directory, process.arch)
+    const { binDir } = await setupLLVM("13.0.0", directory, process.arch)
     await testBin("clang++", ["--version"], binDir)
 
     expect(process.env.CC?.includes("clang")).toBeTruthy()
     expect(process.env.CXX?.includes("clang++")).toBeTruthy()
+
+    // test compilation
+    const file = path.join(__dirname, "main.cpp")
+    const main_exe = path.join(__dirname, addBinExtension("main"))
+    execa.sync("clang++", [file, "-o", main_exe], { cwd: __dirname })
+    if (process.platform !== "win32") {
+      chmodSync(main_exe, "755")
+    }
+    execa.sync(main_exe, { cwd: __dirname, stdio: "inherit" })
   })
 
   it("should find llvm in the cache", async () => {
-    const { binDir } = await setupLLVM("11.0.0", directory, process.arch)
+    const { binDir } = await setupLLVM("13.0.0", directory, process.arch)
     await testBin("clang++", ["--version"], binDir)
 
     if (isGitHubCI()) {
@@ -68,7 +82,7 @@ describe("setup-llvm", () => {
   })
 
   it("should setup clang-tidy and clang-format", async () => {
-    const { binDir } = await setupClangTools("11.0.0", directory, process.arch)
+    const { binDir } = await setupClangTools("13.0.0", directory, process.arch)
     await testBin("clang-tidy", ["--version"], binDir)
     await testBin("clang-format", ["--version"], binDir)
   })
diff --git a/src/llvm/__tests__/main.cpp b/src/llvm/__tests__/main.cpp
new file mode 100644
index 00000000..f3ac3e8a
--- /dev/null
+++ b/src/llvm/__tests__/main.cpp
@@ -0,0 +1,18 @@
+// test std libraries
+#include <iostream>
+#include <string>
+
+// test c libraries
+#include <cassert>
+#include <cctype>
+#include <cstddef>
+#include <cstdint>
+#include <cstring>
+
+int main() {
+    const auto x = 10.0;
+    std::cout << "Testing " << x << '\n';
+
+    const auto y = std::to_string(x);
+    std::cout << "Testing " << y << '\n';
+}