diff --git a/cmd/relui/main.go b/cmd/relui/main.go
index fced950..21c52db 100644
--- a/cmd/relui/main.go
+++ b/cmd/relui/main.go
@@ -6,6 +6,7 @@
 package main
 
 import (
+	"flag"
 	"io/ioutil"
 	"log"
 	"net/http"
@@ -16,8 +17,13 @@
 	reluipb "golang.org/x/build/cmd/relui/protos"
 )
 
+var (
+	devDataDir = flag.String("dev-data-directory", defaultDevDataDir(), "Development-only directory to use for storage of application state.")
+)
+
 func main() {
-	s := &server{store: &memoryStore{}, configs: loadWorkflowConfig("./workflows")}
+	flag.Parse()
+	s := &server{store: newFileStore(*devDataDir), configs: loadWorkflowConfig("./workflows")}
 	http.Handle("/workflows/create", http.HandlerFunc(s.createWorkflowHandler))
 	http.Handle("/workflows/new", http.HandlerFunc(s.newWorkflowHandler))
 	http.Handle("/", fileServerHandler(relativeFile("./static"), http.HandlerFunc(s.homeHandler)))
@@ -54,3 +60,12 @@
 	}
 	return ws
 }
+
+// defaultDevDataDir returns a directory suitable for storage of data when developing relui on most platforms.
+func defaultDevDataDir() string {
+	c, err := os.UserConfigDir()
+	if err != nil {
+		c = os.TempDir()
+	}
+	return filepath.Join(c, "go-build", "relui")
+}
diff --git a/cmd/relui/protos/relui.pb.go b/cmd/relui/protos/relui.pb.go
index 039aaa6..6cca73a 100644
--- a/cmd/relui/protos/relui.pb.go
+++ b/cmd/relui/protos/relui.pb.go
@@ -195,6 +195,47 @@
 	return ""
 }
 
+// LocalStorage is the persisted data of relui. It is used in development mode for saving application state.
+type LocalStorage struct {
+	// workflows are a list of user-created workflows.
+	Workflows            []*Workflow `protobuf:"bytes,1,rep,name=workflows,proto3" json:"workflows,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}    `json:"-"`
+	XXX_unrecognized     []byte      `json:"-"`
+	XXX_sizecache        int32       `json:"-"`
+}
+
+func (m *LocalStorage) Reset()         { *m = LocalStorage{} }
+func (m *LocalStorage) String() string { return proto.CompactTextString(m) }
+func (*LocalStorage) ProtoMessage()    {}
+func (*LocalStorage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_6de8859f82adce0a, []int{2}
+}
+
+func (m *LocalStorage) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_LocalStorage.Unmarshal(m, b)
+}
+func (m *LocalStorage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_LocalStorage.Marshal(b, m, deterministic)
+}
+func (m *LocalStorage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_LocalStorage.Merge(m, src)
+}
+func (m *LocalStorage) XXX_Size() int {
+	return xxx_messageInfo_LocalStorage.Size(m)
+}
+func (m *LocalStorage) XXX_DiscardUnknown() {
+	xxx_messageInfo_LocalStorage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_LocalStorage proto.InternalMessageInfo
+
+func (m *LocalStorage) GetWorkflows() []*Workflow {
+	if m != nil {
+		return m.Workflows
+	}
+	return nil
+}
+
 type GitSource struct {
 	Url                  string   `protobuf:"bytes,1,opt,name=url,proto3" json:"url,omitempty"`
 	Ref                  string   `protobuf:"bytes,2,opt,name=ref,proto3" json:"ref,omitempty"`
@@ -207,7 +248,7 @@
 func (m *GitSource) String() string { return proto.CompactTextString(m) }
 func (*GitSource) ProtoMessage()    {}
 func (*GitSource) Descriptor() ([]byte, []int) {
-	return fileDescriptor_6de8859f82adce0a, []int{2}
+	return fileDescriptor_6de8859f82adce0a, []int{3}
 }
 
 func (m *GitSource) XXX_Unmarshal(b []byte) error {
@@ -247,35 +288,38 @@
 	proto.RegisterType((*Workflow)(nil), "protos.Workflow")
 	proto.RegisterMapType((map[string]string)(nil), "protos.Workflow.ParamsEntry")
 	proto.RegisterType((*BuildableTask)(nil), "protos.BuildableTask")
+	proto.RegisterType((*LocalStorage)(nil), "protos.LocalStorage")
 	proto.RegisterType((*GitSource)(nil), "protos.GitSource")
 }
 
 func init() { proto.RegisterFile("relui.proto", fileDescriptor_6de8859f82adce0a) }
 
 var fileDescriptor_6de8859f82adce0a = []byte{
-	// 384 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x6c, 0x52, 0x4d, 0x6f, 0xda, 0x40,
-	0x10, 0xed, 0x1a, 0xb0, 0xf0, 0xb8, 0xa5, 0x74, 0xdb, 0xaa, 0x56, 0x3f, 0x24, 0xca, 0xc9, 0xe2,
-	0x40, 0x2b, 0xda, 0x43, 0x9b, 0x43, 0x24, 0x27, 0x41, 0x39, 0x20, 0x41, 0x64, 0x1b, 0x71, 0xb4,
-	0xd6, 0xb0, 0x20, 0xcb, 0x8b, 0x6d, 0xed, 0xae, 0x13, 0xf9, 0x57, 0xe6, 0x2f, 0xe4, 0xa7, 0x44,
-	0xbb, 0xd8, 0x09, 0x41, 0x39, 0xf9, 0xed, 0x7b, 0x33, 0x6f, 0xde, 0x8c, 0x0c, 0x36, 0xa7, 0xac,
-	0x4c, 0xc6, 0x05, 0xcf, 0x65, 0x8e, 0x4d, 0xfd, 0x11, 0xc3, 0x7b, 0x04, 0xdd, 0x55, 0xce, 0xd3,
-	0x2d, 0xcb, 0xef, 0x30, 0x86, 0x76, 0x46, 0xf6, 0xd4, 0x41, 0x03, 0xe4, 0x5a, 0xbe, 0xc6, 0xf8,
-	0x1c, 0xde, 0xc7, 0x65, 0xc2, 0x36, 0x24, 0x66, 0x34, 0x92, 0x44, 0xa4, 0xc2, 0x31, 0x06, 0x2d,
-	0xd7, 0x9e, 0x7c, 0x3e, 0x38, 0x89, 0xf1, 0x45, 0x23, 0x87, 0x44, 0xa4, 0x7e, 0x2f, 0x3e, 0x7e,
-	0x0a, 0xfc, 0x17, 0xcc, 0x82, 0x70, 0xb2, 0x17, 0x4e, 0x4b, 0xb7, 0x7d, 0x6f, 0xda, 0x9a, 0xa9,
-	0xe3, 0x1b, 0x2d, 0x4f, 0x33, 0xc9, 0x2b, 0xbf, 0xae, 0xfd, 0xfa, 0x1f, 0xec, 0x23, 0x1a, 0xf7,
-	0xa1, 0x95, 0xd2, 0xaa, 0xce, 0xa5, 0x20, 0xfe, 0x04, 0x9d, 0x5b, 0xc2, 0x4a, 0xea, 0x18, 0x9a,
-	0x3b, 0x3c, 0xce, 0x8c, 0x7f, 0x68, 0xf8, 0x80, 0xe0, 0xdd, 0x8b, 0x48, 0xaf, 0xae, 0xf5, 0x03,
-	0x60, 0x43, 0x0b, 0x9a, 0x6d, 0x44, 0x94, 0x67, 0xb5, 0x89, 0x55, 0x33, 0x8b, 0x0c, 0x8f, 0xc0,
-	0x14, 0x92, 0xc8, 0x52, 0xa5, 0x46, 0x6e, 0x6f, 0x82, 0x9b, 0xd4, 0xca, 0x30, 0xd0, 0x8a, 0x5f,
-	0x57, 0xe0, 0x9f, 0xf0, 0x96, 0x70, 0x99, 0x6c, 0xc9, 0x5a, 0x46, 0x25, 0x67, 0x4e, 0x5b, 0x9b,
-	0xd9, 0x0d, 0xb7, 0xe4, 0x0c, 0xff, 0x06, 0xd8, 0x25, 0x32, 0x12, 0x79, 0xc9, 0xd7, 0xd4, 0xe9,
-	0x0c, 0x90, 0x6b, 0x4f, 0x3e, 0x34, 0x96, 0xd7, 0x89, 0x0c, 0xb4, 0xe0, 0x5b, 0xbb, 0x06, 0xe2,
-	0x6f, 0x60, 0xa9, 0x63, 0x47, 0xb2, 0x2a, 0xa8, 0x63, 0x6a, 0xc7, 0xae, 0x22, 0xc2, 0xaa, 0xa0,
-	0xc3, 0x5f, 0x60, 0x3d, 0x35, 0xa9, 0xdb, 0xa8, 0xa9, 0xf5, 0x6d, 0x4a, 0xce, 0x14, 0xc3, 0xe9,
-	0xb6, 0x5e, 0x4a, 0xc1, 0xd1, 0x0a, 0xe0, 0x39, 0x38, 0xfe, 0x02, 0x1f, 0x43, 0x2f, 0x98, 0x45,
-	0x41, 0xe8, 0x85, 0xcb, 0x20, 0x5a, 0xce, 0x67, 0xf3, 0xc5, 0x6a, 0xde, 0x7f, 0x73, 0x2a, 0x5c,
-	0xfa, 0x53, 0x2f, 0x9c, 0x5e, 0xf5, 0xd1, 0xa9, 0x10, 0x84, 0x9e, 0xaf, 0x04, 0x23, 0x3e, 0xfc,
-	0x46, 0x7f, 0x1e, 0x03, 0x00, 0x00, 0xff, 0xff, 0x73, 0x67, 0x81, 0x13, 0x5c, 0x02, 0x00, 0x00,
+	// 411 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x6c, 0x52, 0x4f, 0x6f, 0xd3, 0x30,
+	0x1c, 0xc5, 0xed, 0x56, 0x2d, 0xbf, 0x8c, 0x51, 0x0c, 0x08, 0x8b, 0x3f, 0x52, 0xe9, 0x29, 0xda,
+	0x21, 0xa0, 0xc2, 0x01, 0x38, 0x4c, 0x0a, 0x50, 0x71, 0x18, 0xea, 0x90, 0x93, 0xaa, 0xc7, 0xc8,
+	0x69, 0xdd, 0x2a, 0x8a, 0x17, 0x47, 0xb6, 0xc3, 0x94, 0x4f, 0xc9, 0x57, 0xe0, 0xa3, 0x20, 0xbb,
+	0x0e, 0x1b, 0xd5, 0x4e, 0x79, 0x7e, 0xef, 0xe7, 0xe7, 0xf7, 0x7b, 0x0a, 0x84, 0x8a, 0x8b, 0xb6,
+	0x8c, 0x1b, 0x25, 0x8d, 0xc4, 0x23, 0xf7, 0xd1, 0xd3, 0xdf, 0x08, 0x4e, 0x56, 0x52, 0x55, 0x5b,
+	0x21, 0x6f, 0x30, 0x86, 0xa3, 0x9a, 0x5d, 0x73, 0x82, 0x26, 0x28, 0x0a, 0xa8, 0xc3, 0xf8, 0x02,
+	0x1e, 0x15, 0x6d, 0x29, 0x36, 0xac, 0x10, 0x3c, 0x37, 0x4c, 0x57, 0x9a, 0x0c, 0x26, 0xc3, 0x28,
+	0x9c, 0x3d, 0xdb, 0x3b, 0xe9, 0xf8, 0x4b, 0x2f, 0x67, 0x4c, 0x57, 0xf4, 0xac, 0xb8, 0x7b, 0xd4,
+	0xf8, 0x03, 0x8c, 0x1a, 0xa6, 0xd8, 0xb5, 0x26, 0x43, 0x77, 0xed, 0x55, 0x7f, 0xad, 0x7f, 0x35,
+	0xfe, 0xe9, 0xe4, 0x79, 0x6d, 0x54, 0x47, 0xfd, 0xec, 0x8b, 0x4f, 0x10, 0xde, 0xa1, 0xf1, 0x18,
+	0x86, 0x15, 0xef, 0x7c, 0x2e, 0x0b, 0xf1, 0x53, 0x38, 0xfe, 0xc5, 0x44, 0xcb, 0xc9, 0xc0, 0x71,
+	0xfb, 0xc3, 0xe7, 0xc1, 0x47, 0x34, 0xfd, 0x83, 0xe0, 0xe1, 0x7f, 0x91, 0xee, 0x5d, 0xeb, 0x35,
+	0xc0, 0x86, 0x37, 0xbc, 0xde, 0xe8, 0x5c, 0xd6, 0xde, 0x24, 0xf0, 0xcc, 0x55, 0x8d, 0xcf, 0x61,
+	0xa4, 0x0d, 0x33, 0xad, 0x4d, 0x8d, 0xa2, 0xb3, 0x19, 0xee, 0x53, 0x5b, 0xc3, 0xd4, 0x29, 0xd4,
+	0x4f, 0xe0, 0x37, 0x70, 0xca, 0x94, 0x29, 0xb7, 0x6c, 0x6d, 0xf2, 0x56, 0x09, 0x72, 0xe4, 0xcc,
+	0xc2, 0x9e, 0x5b, 0x2a, 0x81, 0xdf, 0x01, 0xec, 0x4a, 0x93, 0x6b, 0xd9, 0xaa, 0x35, 0x27, 0xc7,
+	0x13, 0x14, 0x85, 0xb3, 0xc7, 0xbd, 0xe5, 0xf7, 0xd2, 0xa4, 0x4e, 0xa0, 0xc1, 0xae, 0x87, 0xf8,
+	0x25, 0x04, 0xb6, 0xec, 0xdc, 0x74, 0x0d, 0x27, 0x23, 0xe7, 0x78, 0x62, 0x89, 0xac, 0x6b, 0xf8,
+	0xf4, 0x02, 0x4e, 0x7f, 0xc8, 0x35, 0x13, 0xa9, 0x91, 0x8a, 0xed, 0x38, 0x8e, 0x21, 0xb8, 0xf1,
+	0x6d, 0x6a, 0x82, 0x5c, 0xcd, 0xe3, 0xc3, 0x9a, 0xe9, 0xed, 0xc8, 0xf4, 0x2d, 0x04, 0xff, 0x1e,
+	0xb5, 0xdd, 0xda, 0xd4, 0xbe, 0xdb, 0x56, 0x09, 0xcb, 0x28, 0xbe, 0xf5, 0xa5, 0x58, 0x78, 0xbe,
+	0x02, 0xb8, 0x5d, 0x1c, 0x3f, 0x87, 0x27, 0x59, 0x92, 0x5e, 0xe6, 0x69, 0x96, 0x64, 0xcb, 0x34,
+	0x5f, 0x2e, 0x2e, 0x17, 0x57, 0xab, 0xc5, 0xf8, 0xc1, 0xa1, 0xf0, 0x95, 0xce, 0x93, 0x6c, 0xfe,
+	0x6d, 0x8c, 0x0e, 0x85, 0x34, 0x4b, 0xa8, 0x15, 0x06, 0xc5, 0xfe, 0x37, 0x7c, 0xff, 0x37, 0x00,
+	0x00, 0xff, 0xff, 0xfa, 0x0a, 0x66, 0x8f, 0x9c, 0x02, 0x00, 0x00,
 }
diff --git a/cmd/relui/protos/relui.proto b/cmd/relui/protos/relui.proto
index fa1be06..6060dfa 100644
--- a/cmd/relui/protos/relui.proto
+++ b/cmd/relui/protos/relui.proto
@@ -41,6 +41,12 @@
   string task_type = 6;
 }
 
+// LocalStorage is the persisted data of relui. It is used in development mode for saving application state.
+message LocalStorage {
+  // workflows are a list of user-created workflows.
+  repeated Workflow workflows = 1;
+}
+
 message GitSource {
   string url = 1;
   string ref = 2;
diff --git a/cmd/relui/store.go b/cmd/relui/store.go
index 09fd362..a861058 100644
--- a/cmd/relui/store.go
+++ b/cmd/relui/store.go
@@ -5,38 +5,81 @@
 package main
 
 import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
 	"sync"
 
+	"github.com/golang/protobuf/proto"
 	reluipb "golang.org/x/build/cmd/relui/protos"
 )
 
 // store is a persistence adapter for saving data.
 type store interface {
-	GetWorkflows() []*reluipb.Workflow
+	Workflows() []*reluipb.Workflow
 	AddWorkflow(workflow *reluipb.Workflow) error
 }
 
-var _ store = (*memoryStore)(nil)
+var _ store = (*fileStore)(nil)
 
-// memoryStore is a non-durable implementation of store that keeps everything in memory.
-type memoryStore struct {
-	mut       sync.Mutex
-	workflows []*reluipb.Workflow
+// newFileStore initializes a fileStore ready for use.
+//
+// If dir is set to an empty string (""), no data will be saved to disk.
+func newFileStore(dir string) *fileStore {
+	return &fileStore{
+		persistDir: dir,
+		ls:         new(reluipb.LocalStorage),
+	}
 }
 
-// AddWorkflow adds a workflow to the store.
-func (m *memoryStore) AddWorkflow(w *reluipb.Workflow) error {
-	m.mut.Lock()
-	defer m.mut.Unlock()
-	m.workflows = append(m.workflows, w)
+// fileStoreName is the name of the data file used by fileStore for persistence.
+const fileStoreName = "local_storage.textpb"
+
+// fileStore is a non-durable implementation of store that keeps everything in memory.
+type fileStore struct {
+	mu sync.Mutex
+	ls *reluipb.LocalStorage
+
+	// persistDir is a path to a directory for saving application data in textproto format.
+	persistDir string
+}
+
+// AddWorkflow adds a workflow to the store, persisting changes to disk.
+func (f *fileStore) AddWorkflow(w *reluipb.Workflow) error {
+	f.mu.Lock()
+	f.ls.Workflows = append(f.ls.Workflows, w)
+	f.mu.Unlock()
+	if err := f.persist(); err != nil {
+		return err
+	}
 	return nil
 }
 
-// GetWorkflows returns all workflows stored.
-//
-// TODO(golang.org/issue/40279) - clone workflows if they're ever mutated.
-func (m *memoryStore) GetWorkflows() []*reluipb.Workflow {
-	m.mut.Lock()
-	defer m.mut.Unlock()
-	return m.workflows
+// Workflows returns all workflows stored.
+func (f *fileStore) Workflows() []*reluipb.Workflow {
+	return f.localStorage().GetWorkflows()
+}
+
+// localStorage returns a deep copy of data stored in fileStore.
+func (f *fileStore) localStorage() *reluipb.LocalStorage {
+	f.mu.Lock()
+	defer f.mu.Unlock()
+	return proto.Clone(f.ls).(*reluipb.LocalStorage)
+}
+
+// persist saves fileStore state to persistDir/fileStoreName.
+func (f *fileStore) persist() error {
+	if f.persistDir == "" {
+		return nil
+	}
+	if err := os.MkdirAll(f.persistDir, 0755); err != nil {
+		return fmt.Errorf("os.MkDirAll(%q, %v) = %w", f.persistDir, 0755, err)
+	}
+	dst := filepath.Join(f.persistDir, fileStoreName)
+	data := []byte(proto.MarshalTextString(f.localStorage()))
+	if err := ioutil.WriteFile(dst, data, 0644); err != nil {
+		return fmt.Errorf("ioutil.WriteFile(%q, _, %v) = %w", dst, 0644, err)
+	}
+	return nil
 }
diff --git a/cmd/relui/store_test.go b/cmd/relui/store_test.go
new file mode 100644
index 0000000..79843db
--- /dev/null
+++ b/cmd/relui/store_test.go
@@ -0,0 +1,52 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/golang/protobuf/proto"
+	"github.com/google/go-cmp/cmp"
+	reluipb "golang.org/x/build/cmd/relui/protos"
+)
+
+func TestFileStorePersist(t *testing.T) {
+	dir, err := ioutil.TempDir("", "memory-store-test")
+	if err != nil {
+		t.Fatalf("ioutil.TempDir(%q, %q) = _, %v", "", "memory-store-test", err)
+	}
+	defer os.RemoveAll(dir)
+	want := &reluipb.LocalStorage{
+		Workflows: []*reluipb.Workflow{
+			{
+				Name:           "Persist Test",
+				BuildableTasks: []*reluipb.BuildableTask{{Name: "Persist Test Task"}},
+			},
+		},
+	}
+	fs := newFileStore(filepath.Join(dir, "relui"))
+	fs.ls = want
+
+	err = fs.persist()
+	if err != nil {
+		t.Fatalf("fs.Persist() = %v, wanted no error", err)
+	}
+
+	b, err := ioutil.ReadFile(filepath.Join(dir, "relui", fileStoreName))
+	if err != nil {
+		t.Fatalf("ioutil.ReadFile(%q) = _, %v, wanted no error", filepath.Join(dir, "relui", fileStoreName), err)
+	}
+	got := new(reluipb.LocalStorage)
+	err = proto.UnmarshalText(string(b), got)
+	if err != nil {
+		t.Fatalf("proto.UnmarshalText(_) = %v, wanted no error", err)
+	}
+	if diff := cmp.Diff(want, got); diff != "" {
+		t.Errorf("reluipb.LocalStorage mismatch (-want, +got):\n%s", diff)
+	}
+}
diff --git a/cmd/relui/web.go b/cmd/relui/web.go
index fddde4c..a20d2fd 100644
--- a/cmd/relui/web.go
+++ b/cmd/relui/web.go
@@ -64,7 +64,7 @@
 // homeHandler renders the homepage.
 func (s *server) homeHandler(w http.ResponseWriter, _ *http.Request) {
 	out := bytes.Buffer{}
-	if err := homeTmpl.Execute(&out, homeResponse{Workflows: s.store.GetWorkflows()}); err != nil {
+	if err := homeTmpl.Execute(&out, homeResponse{Workflows: s.store.Workflows()}); err != nil {
 		log.Printf("homeHandler: %v", err)
 		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
 		return
@@ -106,6 +106,7 @@
 	}
 	wf.Params["GitObject"] = ref
 	if err := s.store.AddWorkflow(wf); err != nil {
+		log.Printf("Error adding workflow: s.store.AddWorkflow(%v) = %v", wf, err)
 		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
 		return
 	}
diff --git a/cmd/relui/web_test.go b/cmd/relui/web_test.go
index 311a30b..ab1ae59 100644
--- a/cmd/relui/web_test.go
+++ b/cmd/relui/web_test.go
@@ -83,7 +83,7 @@
 	req := httptest.NewRequest(http.MethodGet, "/", nil)
 	w := httptest.NewRecorder()
 
-	s := &server{store: &memoryStore{}}
+	s := &server{store: newFileStore("")}
 	s.homeHandler(w, req)
 	resp := w.Result()
 
@@ -96,7 +96,7 @@
 	req := httptest.NewRequest(http.MethodGet, "/workflows/new", nil)
 	w := httptest.NewRecorder()
 
-	s := &server{store: &memoryStore{}}
+	s := &server{store: newFileStore("")}
 	s.newWorkflowHandler(w, req)
 	resp := w.Result()
 
@@ -134,7 +134,7 @@
 			req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
 			w := httptest.NewRecorder()
 
-			s := &server{store: &memoryStore{}, configs: config}
+			s := &server{store: newFileStore(""), configs: config}
 			s.createWorkflowHandler(w, req)
 			resp := w.Result()
 
@@ -146,16 +146,16 @@
 					t.Errorf("resp.Header.Get(%q) = %q, wanted %q", k, resp.Header.Get(k), v)
 				}
 			}
-			if len(s.store.GetWorkflows()) != 1 && c.wantParams != nil {
-				t.Fatalf("len(s.store.GetWorkflows()) = %d, wanted %d", len(s.store.GetWorkflows()), 1)
-			} else if len(s.store.GetWorkflows()) != 0 && c.wantParams == nil {
-				t.Fatalf("len(s.store.GetWorkflows()) = %d, wanted %d", len(s.store.GetWorkflows()), 0)
+			if len(s.store.Workflows()) != 1 && c.wantParams != nil {
+				t.Fatalf("len(s.store.Workflows()) = %d, wanted %d", len(s.store.Workflows()), 1)
+			} else if len(s.store.Workflows()) != 0 && c.wantParams == nil {
+				t.Fatalf("len(s.store.Workflows()) = %d, wanted %d", len(s.store.Workflows()), 0)
 			}
 			if c.wantParams == nil {
 				return
 			}
-			if diff := cmp.Diff(c.wantParams, s.store.GetWorkflows()[0].GetParams()); diff != "" {
-				t.Errorf("s.Store.GetWorkflows()[0].Params() mismatch (-want, +got):\n%s", diff)
+			if diff := cmp.Diff(c.wantParams, s.store.Workflows()[0].GetParams()); diff != "" {
+				t.Errorf("s.Store.Workflows()[0].Params() mismatch (-want, +got):\n%s", diff)
 			}
 		})
 	}