diff --git a/spec/jwt/jwk/ec_spec.rb b/spec/jwt/jwk/ec_spec.rb
index 3ac40a5d..cc95f627 100644
--- a/spec/jwt/jwk/ec_spec.rb
+++ b/spec/jwt/jwk/ec_spec.rb
@@ -142,15 +142,15 @@
       context 'with missing 0-byte at the start of EC coordinates' do
         let(:example_keysets) do
           [
-            "{\"kty\":\"EC\",\"crv\":\"P-256\",\"x\":\"0Nv5IKAlkvXuAKmOmFgmrwXKR7qGePOzu_7RXg5msw\",\"y\":\"FqnPSNutcjfvXNlufwb7nLJuUEnBkbMdZ3P79nY9c3k\"}",
-            "{\"kty\":\"EC\",\"crv\":\"P-256\",\"x\":\"xGjPg-7meZamM_yfkGeBUB2eJ5c82Y8vQdXwi5cVGw\",\"y\":\"9FwKAuJacVyEy71yoVn1u1ETsQoiwF7QfkfXURGxg14\"}",
-            "{\"kty\":\"EC\",\"crv\":\"P-256\",\"x\":\"yTvy0bwt5s29mIg1DMq-IjZH4pDgZIN9keEEaSuWZhk\",\"y\":\"a0nrmd8qz8jpZDgpY82Rgv3vZ5xiJuiAoMIuRlGnaw\"}",
-            "{\"kty\":\"EC\",\"crv\":\"P-256\",\"x\":\"yJen7AW4lLUTMH4luDj0wlMNSGCuOBB5R-ZoxlAU_g\",\"y\":\"aMbA-M6ORHePSatiPVz_Pzu7z2XRnKMzK-HIscpfud8\"}",
-            "{\"kty\":\"EC\",\"crv\":\"P-256\",\"x\":\"p_D00Z1ydC7mBIpSKPUUrzVzY9Fr5NMhhGfnf4P9guw\",\"y\":\"lCqM3B_s04uhm7_91oycBvoWzuQWJCbMoZc46uqHXA\"}",
-            "{\"kty\":\"EC\",\"crv\":\"P-256\",\"x\":\"hKS-vxV1bvfZ2xOuHv6Qt3lmHIiArTnhWac31kXw3w\",\"y\":\"f_UWjrTpmq_oTdfss7YJ-9dEiYw_JC90kwAE-y0Yu-w\"}",
-            "{\"kty\":\"EC\",\"crv\":\"P-256\",\"x\":\"3W22hN16OJN1XPpUQuCxtwoBRlf-wGyBNIihQiTmSdI\",\"y\":\"eUaveaPQ4CpyfY7sfCqEF1DCOoxHdMpPHW15BmUF0w\"}",
-            "{\"kty\":\"EC\",\"crv\":\"P-256\",\"x\":\"oq_00cGL3SxUZTA-JvcXALhfQya7elFuC7jcJScN7Bs\",\"y\":\"1nNPIinv_gQiwStfx7vqs7Vt_MSyzoQDy9sCnZlFfg\"}",
-            "{\"crv\":\"P-521\",\"kty\":\"EC\",\"x\":\"AMNQr/q+YGv4GfkEjrXH2N0+hnGes4cCqahJlV39m3aJpqSK+uiAvkRE5SDm2bZBc3YHGzhDzfMTUpnvXwjugUQP\",\"y\":\"fIwouWsnp44Fjh2gBmO8ZafnpXZwLOCoaT5itu/Q4Z6j3duRfqmDsqyxZueDA3Gaac2LkbWGplT7mg4j7vCuGsw=\"}"
+            '{"kty":"EC","crv":"P-256","x":"0Nv5IKAlkvXuAKmOmFgmrwXKR7qGePOzu_7RXg5msw","y":"FqnPSNutcjfvXNlufwb7nLJuUEnBkbMdZ3P79nY9c3k"}',
+            '{"kty":"EC","crv":"P-256","x":"xGjPg-7meZamM_yfkGeBUB2eJ5c82Y8vQdXwi5cVGw","y":"9FwKAuJacVyEy71yoVn1u1ETsQoiwF7QfkfXURGxg14"}',
+            '{"kty":"EC","crv":"P-256","x":"yTvy0bwt5s29mIg1DMq-IjZH4pDgZIN9keEEaSuWZhk","y":"a0nrmd8qz8jpZDgpY82Rgv3vZ5xiJuiAoMIuRlGnaw"}',
+            '{"kty":"EC","crv":"P-256","x":"yJen7AW4lLUTMH4luDj0wlMNSGCuOBB5R-ZoxlAU_g","y":"aMbA-M6ORHePSatiPVz_Pzu7z2XRnKMzK-HIscpfud8"}',
+            '{"kty":"EC","crv":"P-256","x":"p_D00Z1ydC7mBIpSKPUUrzVzY9Fr5NMhhGfnf4P9guw","y":"lCqM3B_s04uhm7_91oycBvoWzuQWJCbMoZc46uqHXA"}',
+            '{"kty":"EC","crv":"P-256","x":"hKS-vxV1bvfZ2xOuHv6Qt3lmHIiArTnhWac31kXw3w","y":"f_UWjrTpmq_oTdfss7YJ-9dEiYw_JC90kwAE-y0Yu-w"}',
+            '{"kty":"EC","crv":"P-256","x":"3W22hN16OJN1XPpUQuCxtwoBRlf-wGyBNIihQiTmSdI","y":"eUaveaPQ4CpyfY7sfCqEF1DCOoxHdMpPHW15BmUF0w"}',
+            '{"kty":"EC","crv":"P-256","x":"oq_00cGL3SxUZTA-JvcXALhfQya7elFuC7jcJScN7Bs","y":"1nNPIinv_gQiwStfx7vqs7Vt_MSyzoQDy9sCnZlFfg"}',
+            '{"crv":"P-521","kty":"EC","x":"AMNQr/q+YGv4GfkEjrXH2N0+hnGes4cCqahJlV39m3aJpqSK+uiAvkRE5SDm2bZBc3YHGzhDzfMTUpnvXwjugUQP","y":"fIwouWsnp44Fjh2gBmO8ZafnpXZwLOCoaT5itu/Q4Z6j3duRfqmDsqyxZueDA3Gaac2LkbWGplT7mg4j7vCuGsw="}'
           ]
         end