diff --git a/storage/sql/config.go b/storage/sql/config.go
index 4bff016b..f8cdf248 100644
--- a/storage/sql/config.go
+++ b/storage/sql/config.go
@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"net/url"
 	"strconv"
-	"time"
 
 	"github.com/coreos/dex/storage"
 )
@@ -22,7 +21,7 @@ func (s *SQLite3) Open() (storage.Storage, error) {
 	if err != nil {
 		return nil, err
 	}
-	return withGC(conn, time.Now), nil
+	return conn, nil
 }
 
 func (s *SQLite3) open() (*conn, error) {
@@ -76,7 +75,7 @@ func (p *Postgres) Open() (storage.Storage, error) {
 	if err != nil {
 		return nil, err
 	}
-	return withGC(conn, time.Now), nil
+	return conn, nil
 }
 
 func (p *Postgres) open() (*conn, error) {
diff --git a/storage/sql/config_test.go b/storage/sql/config_test.go
index 55a9d69c..e877421e 100644
--- a/storage/sql/config_test.go
+++ b/storage/sql/config_test.go
@@ -54,7 +54,7 @@ func TestSQLite3(t *testing.T) {
 	}
 
 	withTimeout(time.Second*10, func() {
-		conformance.RunTestSuite(t, newStorage)
+		conformance.RunTests(t, newStorage)
 	})
 }
 
@@ -85,6 +85,6 @@ func TestPostgres(t *testing.T) {
 		return conn
 	}
 	withTimeout(time.Minute*1, func() {
-		conformance.RunTestSuite(t, newStorage)
+		conformance.RunTests(t, newStorage)
 	})
 }
diff --git a/storage/sql/crud.go b/storage/sql/crud.go
index ca941f7c..0f8858de 100644
--- a/storage/sql/crud.go
+++ b/storage/sql/crud.go
@@ -7,6 +7,7 @@ import (
 	"errors"
 	"fmt"
 	"strings"
+	"time"
 
 	"github.com/coreos/dex/storage"
 )
@@ -83,6 +84,25 @@ type scanner interface {
 	Scan(dest ...interface{}) error
 }
 
+func (c *conn) GarbageCollect(now time.Time) (result storage.GCResult, err error) {
+	r, err := c.Exec(`delete from auth_request where expiry < $1`, now)
+	if err != nil {
+		return result, fmt.Errorf("gc auth_request: %v", err)
+	}
+	if n, err := r.RowsAffected(); err == nil {
+		result.AuthRequests = n
+	}
+
+	r, err = c.Exec(`delete from auth_code where expiry < $1`, now)
+	if err != nil {
+		return result, fmt.Errorf("gc auth_code: %v", err)
+	}
+	if n, err := r.RowsAffected(); err == nil {
+		result.AuthCodes = n
+	}
+	return
+}
+
 func (c *conn) CreateAuthRequest(a storage.AuthRequest) error {
 	_, err := c.Exec(`
 		insert into auth_request (
diff --git a/storage/sql/gc.go b/storage/sql/gc.go
deleted file mode 100644
index 1636c087..00000000
--- a/storage/sql/gc.go
+++ /dev/null
@@ -1,53 +0,0 @@
-package sql
-
-import (
-	"context"
-	"fmt"
-	"log"
-	"time"
-
-	"github.com/coreos/dex/storage"
-)
-
-type gc struct {
-	now  func() time.Time
-	conn *conn
-}
-
-func (gc gc) run() error {
-	for _, table := range []string{"auth_request", "auth_code"} {
-		_, err := gc.conn.Exec(`delete from `+table+` where expiry < $1`, gc.now())
-		if err != nil {
-			return fmt.Errorf("gc %s: %v", table, err)
-		}
-		// TODO(ericchiang): when we have levelled logging print how many rows were gc'd
-	}
-	return nil
-}
-
-type withCancel struct {
-	storage.Storage
-	cancel context.CancelFunc
-}
-
-func (w withCancel) Close() error {
-	w.cancel()
-	return w.Storage.Close()
-}
-
-func withGC(conn *conn, now func() time.Time) storage.Storage {
-	ctx, cancel := context.WithCancel(context.Background())
-	run := (gc{now, conn}).run
-	go func() {
-		for {
-			select {
-			case <-time.After(time.Second * 30):
-				if err := run(); err != nil {
-					log.Printf("gc failed: %v", err)
-				}
-			case <-ctx.Done():
-			}
-		}
-	}()
-	return withCancel{conn, cancel}
-}
diff --git a/storage/sql/gc_test.go b/storage/sql/gc_test.go
deleted file mode 100644
index ad6097e0..00000000
--- a/storage/sql/gc_test.go
+++ /dev/null
@@ -1,53 +0,0 @@
-package sql
-
-import (
-	"testing"
-	"time"
-
-	"github.com/coreos/dex/storage"
-)
-
-func TestGC(t *testing.T) {
-	// TODO(ericchiang): Add a GarbageCollect method to the storage interface so
-	// we can write conformance tests instead of directly testing each implementation.
-	s := &SQLite3{":memory:"}
-	conn, err := s.open()
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer conn.Close()
-
-	clock := time.Now()
-	now := func() time.Time { return clock }
-
-	runGC := (gc{now, conn}).run
-
-	a := storage.AuthRequest{
-		ID:     storage.NewID(),
-		Expiry: now().Add(time.Second),
-	}
-
-	if err := conn.CreateAuthRequest(a); err != nil {
-		t.Fatal(err)
-	}
-
-	if err := runGC(); err != nil {
-		t.Errorf("gc failed: %v", err)
-	}
-
-	if _, err := conn.GetAuthRequest(a.ID); err != nil {
-		t.Errorf("failed to get auth request after gc: %v", err)
-	}
-
-	clock = clock.Add(time.Minute)
-
-	if err := runGC(); err != nil {
-		t.Errorf("gc failed: %v", err)
-	}
-
-	if _, err := conn.GetAuthRequest(a.ID); err == nil {
-		t.Errorf("expected error after gc'ing auth request: %v", err)
-	} else if err != storage.ErrNotFound {
-		t.Errorf("expected error storage.NotFound got: %v", err)
-	}
-}