diff --git a/README.md b/README.md
index ccd4a00b41..515ce17d1a 100644
--- a/README.md
+++ b/README.md
@@ -135,7 +135,7 @@ configuration section in your `.ko.yaml`.
 ```yaml
 builds:
 - id: foo
-  dir: .
+  dir: .  # default is .
   main: ./foobar/foo
   env:
   - GOPRIVATE=git.internal.example.com,source.developers.google.com
@@ -148,7 +148,7 @@ builds:
   - -X main.version={{.Env.VERSION}}
 - id: bar
   dir: ./bar
-  main: .
+  main: .  # default is .
   env:
   - GOCACHE=/workspace/.gocache
   ldflags:
diff --git a/integration_test.sh b/integration_test.sh
index c51747f185..46b4c15611 100755
--- a/integration_test.sh
+++ b/integration_test.sh
@@ -95,37 +95,12 @@ GO111MODULE=on ./ko/ko build --local github.com/go-training/helloworld && exit 1
 popd || exit 1
 
 echo "8. On outside with build config specifying the test module builds."
-ko_exec_dir=$(pwd)
-pushd "$(mktemp -d)" || exit 1
-for app in foo bar ; do
-  mkdir -p $app/cmd || exit 1
-  pushd $app || exit 1
-  GO111MODULE=on go mod init example.com/$app || exit 1
-  cat << EOF > ./cmd/main.go || exit 1
-package main
-
-import "fmt"
-
-func main() {
-	fmt.Println("$app")
-}
-EOF
-  popd || exit 1
-done
-cat << EOF > .ko.yaml || exit 1
-builds:
-- id: foo-app
-  dir: ./foo
-  main: ./cmd
-- id: bar-app
-  dir: ./bar
-  main: ./cmd
-EOF
+pushd test/build-configs || exit 1
 for app in foo bar ; do
   # test both local and fully qualified import paths
   for prefix in example.com . ; do
     import_path=$prefix/$app/cmd
-    RESULT="$(GO111MODULE=on GOFLAGS="" "$ko_exec_dir"/ko publish --local $import_path | grep "$FILTER" | xargs -I% docker run %)"
+    RESULT="$(GO111MODULE=on GOFLAGS="" ../../ko build --local $import_path | grep "$FILTER" | xargs -I% docker run %)"
     if [[ "$RESULT" != *"$app"* ]]; then
       echo "Test FAILED for $import_path. Saw $RESULT but expected $app" && exit 1
     else
diff --git a/test/build-configs/.ko.yaml b/test/build-configs/.ko.yaml
new file mode 100644
index 0000000000..c92d94308b
--- /dev/null
+++ b/test/build-configs/.ko.yaml
@@ -0,0 +1,21 @@
+# Copyright 2021 Google LLC All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+builds:
+- id: foo-app
+  dir: ./foo
+  main: ./cmd
+- id: bar-app
+  dir: ./bar
+  main: ./cmd
diff --git a/test/build-configs/bar/cmd/main.go b/test/build-configs/bar/cmd/main.go
new file mode 100644
index 0000000000..bde5a7f432
--- /dev/null
+++ b/test/build-configs/bar/cmd/main.go
@@ -0,0 +1,21 @@
+// Copyright 2021 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("bar")
+}
diff --git a/test/build-configs/bar/go.mod b/test/build-configs/bar/go.mod
new file mode 100644
index 0000000000..fac14d9e39
--- /dev/null
+++ b/test/build-configs/bar/go.mod
@@ -0,0 +1,17 @@
+// Copyright 2021 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+module example.com/bar
+
+go 1.16
diff --git a/test/build-configs/foo/cmd/main.go b/test/build-configs/foo/cmd/main.go
new file mode 100644
index 0000000000..18cc492353
--- /dev/null
+++ b/test/build-configs/foo/cmd/main.go
@@ -0,0 +1,21 @@
+// Copyright 2021 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("foo")
+}
diff --git a/test/build-configs/foo/go.mod b/test/build-configs/foo/go.mod
new file mode 100644
index 0000000000..9a4b1cec8e
--- /dev/null
+++ b/test/build-configs/foo/go.mod
@@ -0,0 +1,17 @@
+// Copyright 2021 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+module example.com/foo
+
+go 1.16