diff --git a/std/security/signer/ed25519_test.go b/std/security/signer/ed25519_test.go
index 73d6ff4..93d4a22 100644
--- a/std/security/signer/ed25519_test.go
+++ b/std/security/signer/ed25519_test.go
@@ -3,12 +3,10 @@ package signer_test
 import (
 	"crypto/ed25519"
 	"crypto/x509"
-	"encoding/base64"
 	"testing"
 
 	enc "github.com/named-data/ndnd/std/encoding"
 	"github.com/named-data/ndnd/std/ndn"
-	spec "github.com/named-data/ndnd/std/ndn/spec_2022"
 	sig "github.com/named-data/ndnd/std/security/signer"
 	"github.com/named-data/ndnd/std/utils"
 	"github.com/stretchr/testify/require"
@@ -74,22 +72,3 @@ func TestEd25519Parse(t *testing.T) {
 	_, err := sig.ParseEd25519(TEST_KEY_NAME, pub2)
 	require.Error(t, err)
 }
-
-// TestEd25519ValidateInterop tests the validator using a given
-// certificate for interoperability.
-func TestEd25519ValidateInterop(t *testing.T) {
-	utils.SetTestingT(t)
-
-	const TestCert = `
-Bv0BCgc1CAxFZDI1NTE5LWRlbW8IA0tFWQgQNWE2MTVkYjdjZjA2MDNiNQgEc2Vs
-ZjYIAAABgQD8AY0UCRgBAhkEADbugBUsMCowBQYDK2VwAyEAQxUZBL+3I3D4oDIJ
-tJvuCTguHM7AUbhlhA/wu8ZhrkwWVhsBBRwnByUIDEVkMjU1MTktZGVtbwgDS0VZ
-CBA1YTYxNWRiN2NmMDYwM2I1/QD9Jv0A/g8xOTcwMDEwMVQwMDAwMDD9AP8PMjAy
-MjA1MjZUMTUyODQ0F0DAAWCZzxQSCAV0tluFDry5aT1b+EgoYgT1JKxbKVb/tINx
-M43PFy/2hDe8j61PuYD9tCah0TWapPwfXWi3fygA`
-
-	certWire := utils.WithoutErr(base64.RawStdEncoding.DecodeString(TestCert))
-	certData, sigCov, err := spec.Spec{}.ReadData(enc.NewBufferReader(certWire))
-	require.NoError(t, err)
-	require.True(t, utils.WithoutErr(sig.ValidateData(certData, sigCov, certData)))
-}
diff --git a/std/security/signer/validate_test.go b/std/security/signer/validate_test.go
new file mode 100644
index 0000000..10bc68b
--- /dev/null
+++ b/std/security/signer/validate_test.go
@@ -0,0 +1,79 @@
+package signer_test
+
+import (
+	"encoding/base64"
+	"testing"
+
+	enc "github.com/named-data/ndnd/std/encoding"
+	spec "github.com/named-data/ndnd/std/ndn/spec_2022"
+	sig "github.com/named-data/ndnd/std/security/signer"
+	"github.com/named-data/ndnd/std/utils"
+	"github.com/stretchr/testify/require"
+)
+
+// testValidateSelfSigned tests the self-signed certificate validation.
+// These certificates are generated by the ndn-cxx library, and are used for
+// checking the interoperability of the validation logic.
+func testValidateSelfSigned(t *testing.T, certB64 string) {
+	certWire := utils.WithoutErr(base64.StdEncoding.DecodeString(certB64))
+
+	// Helper to test the signature validation result
+	test := func(result bool) {
+		certData, sigCov, err := spec.Spec{}.ReadData(enc.NewBufferReader(certWire))
+		require.NoError(t, err)
+		require.Equal(t, result, utils.WithoutErr(sig.ValidateData(certData, sigCov, certData)))
+	}
+
+	// Test with valid signature
+	test(true)
+
+	// Tamper with the signature (guess)
+	certWire[len(certWire)-10] ^= 0x01
+	test(false)
+}
+
+// TestEd25519ValidateInterop tests the Ed25519 self-signed certificate validation.
+func TestEd25519ValidateInterop(t *testing.T) {
+	utils.SetTestingT(t)
+	testValidateSelfSigned(t, `
+Bv0BCgc1CAxFZDI1NTE5LWRlbW8IA0tFWQgQNWE2MTVkYjdjZjA2MDNiNQgEc2Vs
+ZjYIAAABgQD8AY0UCRgBAhkEADbugBUsMCowBQYDK2VwAyEAQxUZBL+3I3D4oDIJ
+tJvuCTguHM7AUbhlhA/wu8ZhrkwWVhsBBRwnByUIDEVkMjU1MTktZGVtbwgDS0VZ
+CBA1YTYxNWRiN2NmMDYwM2I1/QD9Jv0A/g8xOTcwMDEwMVQwMDAwMDD9AP8PMjAy
+MjA1MjZUMTUyODQ0F0DAAWCZzxQSCAV0tluFDry5aT1b+EgoYgT1JKxbKVb/tINx
+M43PFy/2hDe8j61PuYD9tCah0TWapPwfXWi3fygA`)
+}
+
+// TestEccValidateInterop tests the ECC self-signed certificate validation.
+func TestEccValidateInterop(t *testing.T) {
+	utils.SetTestingT(t)
+	testValidateSelfSigned(t, `
+Bv0BLAcrCANuZG4IBWFsaWNlCANLRVkICH+xyxHFjoVZCARzZWxmNggAAAGUjIqk
+mBQJGAECGQQANu6AFVswWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAATMnLNLJ+sy
+AuZ0XYKJskUyVDxBLl5SzljivyaUVizG+yKLePyrmDE+VE8rXNhzENqTxuJNXB7X
+RRLCzfAwjsxOFkwbAQMcHQcbCANuZG4IBWFsaWNlCANLRVkICH+xyxHFjoVZ/QD9
+Jv0A/g8yMDI1MDEyMlQwNTQ0NDP9AP8PMjA0NTAxMTdUMDU0NDQzF0cwRQIgPBz3
+hoMiTZzX/cSamxah0qaXNkveGkZqqao2nLQnC/sCIQCGf7akPnoYFMq40sRV4nHF
+deWX6c79riyoiuURUu0Vhw==`)
+}
+
+// TestRsaValidateInterop tests the RSA self-signed certificate validation.
+func TestRsaValidateInterop(t *testing.T) {
+	utils.SetTestingT(t)
+	testValidateSelfSigned(t, `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`)
+}