diff --git a/org.hl7.fhir.r4/src/test/java/org/hl7/fhir/r4/terminologies/ConceptMapEngineTest.java b/org.hl7.fhir.r4/src/test/java/org/hl7/fhir/r4/terminologies/ConceptMapEngineTest.java
new file mode 100644
index 000000000..acbcb4999
--- /dev/null
+++ b/org.hl7.fhir.r4/src/test/java/org/hl7/fhir/r4/terminologies/ConceptMapEngineTest.java
@@ -0,0 +1,45 @@
+package org.hl7.fhir.r4.terminologies;
+
+import org.hl7.fhir.r4.context.SimpleWorkerContext;
+import org.hl7.fhir.r4.model.Coding;
+import org.hl7.fhir.r4.model.ConceptMap;
+import org.hl7.fhir.r4.model.Enumerations;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.util.Collections;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class ConceptMapEngineTest {
+
+  private static final String CONCEPT_MAP_URL = "https://test-fhir.com/ConceptMap/fake";
+
+  @Test
+  void translate() throws IOException {
+    ConceptMap.TargetElementComponent targetElementComponent = new ConceptMap.TargetElementComponent();
+    targetElementComponent.setCode("vital-signs");
+    targetElementComponent.setEquivalence(Enumerations.ConceptMapEquivalence.EQUIVALENT);
+
+    ConceptMap.SourceElementComponent sourceElementComponent = new ConceptMap.SourceElementComponent();
+    sourceElementComponent.setCode("body-weight");
+    sourceElementComponent.setTarget(Collections.singletonList(targetElementComponent));
+
+    ConceptMap.ConceptMapGroupComponent conceptMapGroupComponent = new ConceptMap.ConceptMapGroupComponent();
+
+    ConceptMap conceptMap = new ConceptMap();
+    conceptMap.addGroup(conceptMapGroupComponent);
+    conceptMap.setUrl(CONCEPT_MAP_URL);
+
+    SimpleWorkerContext simpleWorkerContext = new SimpleWorkerContext();
+    simpleWorkerContext.cacheResource(conceptMap);
+
+    ConceptMapEngine conceptMapEngine = new ConceptMapEngine(simpleWorkerContext);
+
+    Coding coding = new Coding(null, "body-weight", "Body Weight");
+
+    Coding actual = conceptMapEngine.translate(coding, CONCEPT_MAP_URL);
+
+    assertEquals("vital-signs", actual.getCode());
+  }
+}