diff --git a/src/gcc/__tests__/gcc.test.ts b/src/gcc/__tests__/gcc.test.ts
index ff57ea2b..d3eba8e2 100644
--- a/src/gcc/__tests__/gcc.test.ts
+++ b/src/gcc/__tests__/gcc.test.ts
@@ -13,5 +13,8 @@ describe("setup-gcc", () => {
       gpp = `g++-${version}`
     }
     await testBin(gpp, ["--version"], installInfo?.binDir)
+
+    expect(process.env.CC?.includes("gcc")).toBeTruthy()
+    expect(process.env.CXX?.includes("g++")).toBeTruthy()
   })
 })
diff --git a/src/llvm/__tests__/llvm.test.ts b/src/llvm/__tests__/llvm.test.ts
index 613814cc..02ca22c0 100644
--- a/src/llvm/__tests__/llvm.test.ts
+++ b/src/llvm/__tests__/llvm.test.ts
@@ -44,6 +44,9 @@ describe("setup-llvm", () => {
   it("should setup LLVM", async () => {
     const { binDir } = await setupLLVM("11.0.0", directory, "")
     await testBin("clang++", ["--version"], binDir)
+
+    expect(process.env.CC?.includes("clang")).toBeTruthy()
+    expect(process.env.CXX?.includes("clang++")).toBeTruthy()
   })
 
   afterAll(async () => {