diff --git a/internal-api/src/test/groovy/datadog/trace/api/WellKnownTagsTest.groovy b/internal-api/src/test/groovy/datadog/trace/api/WellKnownTagsTest.groovy
deleted file mode 100644
index 6474142bced..00000000000
--- a/internal-api/src/test/groovy/datadog/trace/api/WellKnownTagsTest.groovy
+++ /dev/null
@@ -1,19 +0,0 @@
-package datadog.trace.api
-
-import datadog.trace.test.util.DDSpecification
-
-class WellKnownTagsTest extends DDSpecification {
-
-  def "well known tags doesn't modify its inputs"() {
-    given:
-    WellKnownTags wellKnownTags =
-      new WellKnownTags("runtimeid", "hostname", "env", "service", "version","language")
-    expect:
-    wellKnownTags.getRuntimeId() as String == "runtimeid"
-    wellKnownTags.getHostname() as String == "hostname"
-    wellKnownTags.getEnv() as String == "env"
-    wellKnownTags.getService() as String == "service"
-    wellKnownTags.getVersion() as String == "version"
-    wellKnownTags.getLanguage() as String == "language"
-  }
-}
diff --git a/internal-api/src/test/java/datadog/trace/api/WellKnownTagsTest.java b/internal-api/src/test/java/datadog/trace/api/WellKnownTagsTest.java
new file mode 100644
index 00000000000..f164ab7006d
--- /dev/null
+++ b/internal-api/src/test/java/datadog/trace/api/WellKnownTagsTest.java
@@ -0,0 +1,32 @@
+package datadog.trace.api;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+class WellKnownTagsTest {
+
+  @Test
+  void wellKnownTagsDoesNotModifyInputs() {
+    WellKnownTags wellKnownTags =
+        new WellKnownTags("runtimeid", "hostname", "env", "service", "version", "language");
+
+    assertEquals("runtimeid", wellKnownTags.getRuntimeId().toString());
+    assertEquals("hostname", wellKnownTags.getHostname().toString());
+    assertEquals("env", wellKnownTags.getEnv().toString());
+    assertEquals("service", wellKnownTags.getService().toString());
+    assertEquals("version", wellKnownTags.getVersion().toString());
+    assertEquals("language", wellKnownTags.getLanguage().toString());
+  }
+
+  @Test
+  void toStringIncludesAllFields() {
+    WellKnownTags wellKnownTags =
+        new WellKnownTags("runtimeid", "hostname", "env", "service", "version", "language");
+
+    assertEquals(
+        "WellKnownTags{runtimeId=runtimeid, hostname=hostname, env=env,"
+            + " service=service, version=version, language=language}",
+        wellKnownTags.toString());
+  }
+}