diff --git a/hack/lib/golang.sh b/hack/lib/golang.sh
index fbbf34b4de5..f30d4cbbb91 100755
--- a/hack/lib/golang.sh
+++ b/hack/lib/golang.sh
@@ -53,13 +53,17 @@ readonly KUBE_SERVER_BINARIES=("${KUBE_SERVER_TARGETS[@]##*/}")
 
 if [[ "${KUBE_FASTBUILD:-}" == "true" ]]; then
   readonly KUBE_SERVER_PLATFORMS=(linux/amd64)
-  readonly KUBE_TEST_PLATFORMS=(linux/amd64)
   if [[ "${KUBE_BUILDER_OS:-}" == "darwin"* ]]; then
+    readonly KUBE_TEST_PLATFORMS=(
+      darwin/amd64
+      linux/amd64
+    )
     readonly KUBE_CLIENT_PLATFORMS=(
       darwin/amd64
       linux/amd64
     )
   else
+    readonly KUBE_TEST_PLATFORMS=(linux/amd64)
     readonly KUBE_CLIENT_PLATFORMS=(linux/amd64)
   fi
 else