diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 22c52f4..8c6dbf4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -51,13 +51,13 @@ jobs:
         version: v2.5.0
 
     - name: Test
-      run: go test -v ./...
+      run: make test
 
     - name: Fuzz Test
       run: go test -fuzz=FuzzCalculateFileChunks -fuzztime=10s ./util
 
     - name: Build
-      run: go build .
+      run: make build
 
     - name: Perform CodeQL Analysis
       uses: github/codeql-action/analyze@76621b61decf072c1cee8dd1ce2d2a82d33c17ed # v3
@@ -117,6 +117,7 @@ jobs:
     - name: Build
       env:
         CGO_ENABLED: '0'
+        GOEXPERIMENT: 'jsonv2'
         GOOS: ${{ matrix.os }}
         GOARCH: ${{ matrix.arch }}
       run: go build .
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..a1a89e2
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,10 @@
+lint:
+	golangci-lint run
+
+test:
+	GOEXPERIMENT=jsonv2 go test ./...
+
+build:
+	GOEXPERIMENT=jsonv2 go build .
+
+.PHONY: lint test build
diff --git a/fhir/client_test.go b/fhir/client_test.go
index 86d90e0..e81cb8b 100644
--- a/fhir/client_test.go
+++ b/fhir/client_test.go
@@ -494,7 +494,7 @@ func TestPollAsyncStatus(t *testing.T) {
 
 		_, err := pollAsyncStatus(server)
 
-		assert.Equal(t, "error while reading the outcome of an error response in the async response bundle: json: cannot unmarshal array into Go value of type fhir.OperationOutcome", err.Error())
+		assert.Equal(t, "error while reading the outcome of an error response in the async response bundle: json: cannot unmarshal JSON array into Go type fhir.OperationOutcome", err.Error())
 	})
 
 	t.Run("async response with error bundle entry with outcome", func(t *testing.T) {