diff --git a/test/jdk/sun/security/tools/keytool/fakegen/DefaultSignatureAlgorithm.java b/test/jdk/sun/security/tools/keytool/fakegen/DefaultSignatureAlgorithm.java
index 6f2d918093b..78929c3bc71 100644
--- a/test/jdk/sun/security/tools/keytool/fakegen/DefaultSignatureAlgorithm.java
+++ b/test/jdk/sun/security/tools/keytool/fakegen/DefaultSignatureAlgorithm.java
@@ -74,8 +74,9 @@ private static void check(String keyAlg, int keySize,
         String sigAlgParam = requestedSigAlg == null
                 ? ""
                 : (" -sigalg " + requestedSigAlg);
+        System.out.println("starting...");
         genkeypair(alias,
-                "-keyalg " + keyAlg + " -keysize " + keySize + sigAlgParam)
+                "-keyalg " + keyAlg + " -keysize " + keySize + sigAlgParam + " -debug -J-Djdk.nativeCryptoTrace=true")
             .shouldHaveExitValue(0);
 
         KeyStore ks = KeyStore.getInstance(
diff --git a/test/jdk/sun/security/tools/keytool/fakegen/jdk.crypto.ec/sun/security/ec/ECKeyPairGenerator.java b/test/jdk/sun/security/tools/keytool/fakegen/jdk.crypto.ec/sun/security/ec/ECKeyPairGenerator.java
index 68da125087f..40263f26c85 100644
--- a/test/jdk/sun/security/tools/keytool/fakegen/jdk.crypto.ec/sun/security/ec/ECKeyPairGenerator.java
+++ b/test/jdk/sun/security/tools/keytool/fakegen/jdk.crypto.ec/sun/security/ec/ECKeyPairGenerator.java
@@ -27,6 +27,7 @@
 import java.security.*;
 import java.security.spec.AlgorithmParameterSpec;
 import java.security.spec.ECParameterSpec;
+import java.security.spec.ECGenParameterSpec;
 import java.security.spec.ECPoint;
 
 import sun.security.util.ECUtil;
@@ -51,7 +52,28 @@ public void initialize(int keySize, SecureRandom random) {
     @Override
     public void initialize(AlgorithmParameterSpec params, SecureRandom random)
             throws InvalidAlgorithmParameterException {
-        throw new UnsupportedOperationException();
+        ECParameterSpec ecSpec = null;
+
+        if (params instanceof ECParameterSpec) {
+            ECParameterSpec ecParams = (ECParameterSpec) params;
+            ecSpec = ECUtil.getECParameterSpec(null, ecParams);
+            if (ecSpec == null) {
+                throw new InvalidAlgorithmParameterException(
+                    "Unsupported curve: " + params);
+            }
+        } else if (params instanceof ECGenParameterSpec) {
+            String name = ((ECGenParameterSpec) params).getName();
+            ecSpec = ECUtil.getECParameterSpec(null, name);
+            if (ecSpec == null) {
+                throw new InvalidAlgorithmParameterException(
+                    "Unknown curve name: " + name);
+            }
+        } else {
+            throw new InvalidAlgorithmParameterException(
+                "ECParameterSpec or ECGenParameterSpec required for EC");
+        }
+
+        this.keySize = ecSpec.getCurve().getField().getFieldSize();
     }
 
     @Override