diff --git a/samples/doc.go b/samples/doc_test.go
similarity index 100%
rename from samples/doc.go
rename to samples/doc_test.go
diff --git a/samples/mostly-adequate/doc.go b/samples/mostly-adequate/doc_test.go
similarity index 100%
rename from samples/mostly-adequate/doc.go
rename to samples/mostly-adequate/doc_test.go
diff --git a/samples/mostly-adequate/support.go b/samples/mostly-adequate/support_test.go
similarity index 100%
rename from samples/mostly-adequate/support.go
rename to samples/mostly-adequate/support_test.go
diff --git a/samples/presentation/benchmarks/utils.go b/samples/presentation/benchmarks/utils_test.go
similarity index 100%
rename from samples/presentation/benchmarks/utils.go
rename to samples/presentation/benchmarks/utils_test.go