diff --git a/go.mod b/go.mod
index 8257b85839..284c1c3a6b 100644
--- a/go.mod
+++ b/go.mod
@@ -7,6 +7,7 @@ require (
 	github.com/ghodss/yaml v1.0.0
 	github.com/gogo/protobuf v1.0.0 // indirect
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
+	github.com/google/go-cmp v0.3.0
 	github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.6 // indirect
diff --git a/go.sum b/go.sum
index f7bdabe92a..c9ea4d6ce3 100644
--- a/go.sum
+++ b/go.sum
@@ -7,6 +7,8 @@ github.com/gogo/protobuf v1.0.0 h1:2jyBKDKU/8v3v2xVR2PtiWQviFUyiaGk2rpfyFT8rTM=
 github.com/gogo/protobuf v1.0.0/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
+github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
+github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf h1:+RRA9JqSOZFfKrOeqr2z77+8R2RKyh8PG66dcu1V0ck=
 github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf/go.mod h1:HP5RmnzzSNb993RKQDq4+1A4ia9nllfqcQFTQJedwGI=
 github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
diff --git a/hack/run-integration-tests.sh b/hack/run-integration-tests.sh
index ea27b31f6c..02f0d6f9ad 100755
--- a/hack/run-integration-tests.sh
+++ b/hack/run-integration-tests.sh
@@ -47,4 +47,4 @@ fi
 KREW_BINARY="${krew_binary_realpath}"
 export KREW_BINARY
 
-go test -test.v sigs.k8s.io/krew/integration_test
+GO111MODULE=on go test -test.v sigs.k8s.io/krew/integration_test
diff --git a/hack/run-lint.sh b/hack/run-lint.sh
index 6ad52a06c9..983fe20af8 100755
--- a/hack/run-lint.sh
+++ b/hack/run-lint.sh
@@ -16,6 +16,8 @@
 
 set -euo pipefail
 
+[[ -n "${DEBUG:-}" ]] && set -x
+
 if ! [[ -x "$GOPATH/bin/golangci-lint" ]]
 then
    echo 'Installing golangci-lint'
@@ -23,4 +25,4 @@ then
 fi
 
 # configured by .golangci.yml
-"$GOPATH/bin/golangci-lint" run
+GO111MODULE=on "$GOPATH/bin/golangci-lint" run
diff --git a/hack/run-tests.sh b/hack/run-tests.sh
index 3c06f53a25..5177602c09 100755
--- a/hack/run-tests.sh
+++ b/hack/run-tests.sh
@@ -44,7 +44,7 @@ print_with_color "$color_blue" 'Running gofmt'
 "$SCRIPTDIR"/verify-gofmt.sh
 
 print_with_color "$color_blue" 'Running tests'
-go test -v -short -race sigs.k8s.io/krew/...
+GO111MODULE=on go test -v -short -race sigs.k8s.io/krew/...
 
 print_with_color "$color_blue" 'Running linter'
 "$SCRIPTDIR"/run-lint.sh