diff --git a/cc/testing.go b/cc/testing.go
index dbdee9e..b75734c 100644
--- a/cc/testing.go
+++ b/cc/testing.go
@@ -68,6 +68,26 @@
 
 func commonDefaultModules() string {
 	return `
+		prebuilt_build_tool {
+			name: "clang++",
+			src: "bin/clang++",
+		}
+		prebuilt_build_tool {
+			name: "clang++.real",
+			src: "bin/clang++.real",
+		}
+		prebuilt_build_tool {
+			name: "lld",
+			src: "bin/lld",
+		}
+		prebuilt_build_tool {
+			name: "ld.lld",
+			src: "bin/ld.lld",
+		}
+		prebuilt_build_tool {
+			name: "llvm-ar",
+			src: "bin/llvm-ar",
+		}
 		cc_defaults {
 			name: "toolchain_libs_defaults",
 			host_supported: true,
@@ -569,6 +589,12 @@
 
 	// Additional files needed in tests that disallow non-existent source.
 	android.MockFS{
+		"defaults/cc/common/bin/clang++":      nil,
+		"defaults/cc/common/bin/clang++.real": nil,
+		"defaults/cc/common/bin/lld":          nil,
+		"defaults/cc/common/bin/ld.lld":       nil,
+		"defaults/cc/common/bin/llvm-ar":      nil,
+
 		"defaults/cc/common/libc.map.txt":      nil,
 		"defaults/cc/common/libdl.map.txt":     nil,
 		"defaults/cc/common/libm.map.txt":      nil,