diff --git a/test/testassert.cpp b/test/testassert.cpp
index 2ef4b7413..bf5535918 100644
--- a/test/testassert.cpp
+++ b/test/testassert.cpp
@@ -220,7 +220,7 @@ private:
               "}\n");
         ASSERT_EQUALS("[test.cpp:3]: (warning) Assert statement modifies 'a'.\n", errout.str());
 
-	check("void f() {\n"
+        check("void f() {\n"
               "    int a = 0;\n"
               "    assert(--a);\n"
               "    return a;\n"