diff --git a/openstack/objectstorage/v1/objects/fixtures.go b/openstack/objectstorage/v1/objects/fixtures.go
index d951160..ec61637 100644
--- a/openstack/objectstorage/v1/objects/fixtures.go
+++ b/openstack/objectstorage/v1/objects/fixtures.go
@@ -105,13 +105,31 @@
 	})
 }
 
-// HandleCreateObjectSuccessfully creates an HTTP handler at `/testContainer/testObject` on the test handler mux that
-// responds with a `Create` response.
-func HandleCreateObjectSuccessfully(t *testing.T) {
+// HandleCreateTextObjectSuccessfully creates an HTTP handler at `/testContainer/testObject` on the test handler mux
+// that responds with a `Create` response. A Content-Type of "text/plain" is expected.
+func HandleCreateTextObjectSuccessfully(t *testing.T) {
+	th.Mux.HandleFunc("/testContainer/testObject", func(w http.ResponseWriter, r *http.Request) {
+		th.TestMethod(t, r, "PUT")
+		th.TestHeader(t, r, "X-Auth-Token", fake.TokenID)
+		th.TestHeader(t, r, "Content-Type", "text/plain")
+		th.TestHeader(t, r, "Accept", "application/json")
+		w.WriteHeader(http.StatusCreated)
+	})
+}
+
+// HandleCreateTypelessObjectSuccessfully creates an HTTP handler at `/testContainer/testObject` on the test handler
+// mux that responds with a `Create` response. No Content-Type header may be present in the request, so that server-
+// side content-type detection will be triggered properly.
+func HandleCreateTypelessObjectSuccessfully(t *testing.T) {
 	th.Mux.HandleFunc("/testContainer/testObject", func(w http.ResponseWriter, r *http.Request) {
 		th.TestMethod(t, r, "PUT")
 		th.TestHeader(t, r, "X-Auth-Token", fake.TokenID)
 		th.TestHeader(t, r, "Accept", "application/json")
+
+		if contentType, present := r.Header["Content-Type"]; present {
+			t.Errorf("Expected Content-Type header to be omitted, but was %#v", contentType)
+		}
+
 		w.WriteHeader(http.StatusCreated)
 	})
 }
diff --git a/openstack/objectstorage/v1/objects/requests_test.go b/openstack/objectstorage/v1/objects/requests_test.go
index c3c28a7..6be3534 100644
--- a/openstack/objectstorage/v1/objects/requests_test.go
+++ b/openstack/objectstorage/v1/objects/requests_test.go
@@ -83,14 +83,24 @@
 func TestCreateObject(t *testing.T) {
 	th.SetupHTTP()
 	defer th.TeardownHTTP()
-	HandleCreateObjectSuccessfully(t)
+	HandleCreateTextObjectSuccessfully(t)
 
 	content := bytes.NewBufferString("Did gyre and gimble in the wabe")
-	options := &CreateOpts{ContentType: "application/json"}
+	options := &CreateOpts{ContentType: "text/plain"}
 	res := Create(fake.ServiceClient(), "testContainer", "testObject", content, options)
 	th.AssertNoErr(t, res.Err)
 }
 
+func TestCreateObjectWithoutContentType(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+	HandleCreateTypelessObjectSuccessfully(t)
+
+	content := bytes.NewBufferString("The sky was the color of television, tuned to a dead channel.")
+	res := Create(fake.ServiceClient(), "testContainer", "testObject", content, &CreateOpts{})
+	th.AssertNoErr(t, res.Err)
+}
+
 func TestCopyObject(t *testing.T) {
 	th.SetupHTTP()
 	defer th.TeardownHTTP()