Junit 5 Launcher with jupiter-vintage-engine rule not honoring JUnit4 #ParametrizedTest - junit5

Question

I am working on porting a JUnit4 based test framework that uses JUnitCore to launch unit tests with JUnit5 launcher, junit-vintage-engine and a LauncherDiscoveryRequest with ClassSelector.
It is working for all cases except #ParameterizedTest. Launcher is not honoring parameterized tests.
How do I get Launcher to honor JUnit4 parameterized tests?
I have tried adding testCompile("org.junit.jupiter:junit-jupiter-params:${junit_jupiter_version}")
package ...;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import ...TestCategory;
import ...TestType;
import ...DataScramblingRegexTest;
#TestType(...TestCategory.UNIT)
#RunWith(Parameterized.class)
public class RegexGenTest {
private static final int LOOKAROUND_ATTEMPTS = 100;
#Parameterized.Parameter(0)
public String regex;
#Parameterized.Parameters(name = "{index}: RegexGenTest: {0}")
public static Iterable<String[]> data() {
return DataScramblingRegexTest.data();
}
#Test
public void testTransformAndGenerate() {
//even though Data Scramble Random Text doesn't transform every regex,
//even if we do, and run it through Generex, it should still work.
final String transformedRegex = RegexGen.transform(this.regex);
String randomStr = RegexGen.generate(transformedRegex);
if (RegexGen.containsLookArounds(this.regex)) {
for (int i = 0; i < LOOKAROUND_ATTEMPTS; i++) {
randomStr = RegexGen.generate(transformedRegex);
if (randomStr.matches(this.regex)) {
return;
}
}
Assert.fail("Lookaround failed");
}
Assert.assertTrue("generated string does not match regex: " + randomStr, randomStr.matches(this.regex));
}
}
build.gradle
compile("junit:junit:${junit_version}")
testCompile("org.junit.vintage:junit-vintage-engine:${junit_jupiter_version}")
testCompile("org.junit.jupiter:junit-jupiter-api:${junit_jupiter_version}")
testCompile("org.junit.jupiter:junit-jupiter-params:${junit_jupiter_version}")
testCompile("org.junit.jupiter:junit-jupiter-engine:${junit_jupiter_version}")
where
junit_version=4.12
junit_jupiter_version=5.4.2
Note the proprietary TestCategory.UNIT annotation, we use this in our test discovery code and create a Launcher and a LauncherdiscoveryRequest with ClassSelector.
I expect JUnit 4 parameters to be supported by JUnit5 launcher with junit-jupiter-vintage engine and it is not supported.