diff --git a/Makefile b/Makefile
index c0977ea..02fbe51 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ benchmark: depsdev
 	go test -bench . -benchmem -benchtime 10000x -run Benchmark | octocov-go-test-bench --tee > custom_metrics_benchmark.json
 
 cachegrind: depsdev
-	cd testdata/testbin && go build -o testbin
+	cd testdata/testbin && go mod tidy && go build -o testbin
 	setarch `uname -m` -R valgrind --tool=cachegrind --cachegrind-out-file=cachegrind.out --I1=32768,8,64 --D1=32768,8,64 --LL=8388608,16,64 ./testdata/testbin/testbin 10000
 	cat cachegrind.out | octocov-cachegrind --tee > custom_metrics_cachegrind.json