diff --git a/docs/storage/driver/storagedriver.go b/docs/storage/driver/storagedriver.go
index f0fe7fef..442dc257 100644
--- a/docs/storage/driver/storagedriver.go
+++ b/docs/storage/driver/storagedriver.go
@@ -83,7 +83,7 @@ type StorageDriver interface {
 // number of path components separated by slashes, where each component is
 // restricted to lowercase alphanumeric characters or a period, underscore, or
 // hyphen.
-var PathRegexp = regexp.MustCompile(`^(/[a-z0-9._-]+)+$`)
+var PathRegexp = regexp.MustCompile(`^(/[A-Za-z0-9._-]+)+$`)
 
 // ErrUnsupportedMethod may be returned in the case where a StorageDriver implementation does not support an optional method.
 var ErrUnsupportedMethod = errors.New("unsupported method")
diff --git a/docs/storage/driver/testsuites/testsuites.go b/docs/storage/driver/testsuites/testsuites.go
index 18fd9840..74ddab6f 100644
--- a/docs/storage/driver/testsuites/testsuites.go
+++ b/docs/storage/driver/testsuites/testsuites.go
@@ -136,7 +136,9 @@ func (suite *DriverSuite) TestValidPaths(c *check.C) {
 		"/.abc",
 		"/a--b",
 		"/a-.b",
-		"/_.abc"}
+		"/_.abc",
+		"/Docker/docker-registry",
+		"/Abc/Cba"}
 
 	for _, filename := range validFiles {
 		err := suite.StorageDriver.PutContent(filename, contents)
@@ -159,8 +161,7 @@ func (suite *DriverSuite) TestInvalidPaths(c *check.C) {
 		"abc",
 		"123.abc",
 		"//bcd",
-		"/abc_123/",
-		"/Docker/docker-registry"}
+		"/abc_123/"}
 
 	for _, filename := range invalidFiles {
 		err := suite.StorageDriver.PutContent(filename, contents)