diff --git a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/OB20Inspector.java b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/OB20Inspector.java
index c2a4f38..0f6c636 100644
--- a/inspector-vc/src/main/java/org/oneedtech/inspect/vc/OB20Inspector.java
+++ b/inspector-vc/src/main/java/org/oneedtech/inspect/vc/OB20Inspector.java
@@ -99,6 +99,14 @@ public class OB20Inspector extends Inspector {
 			// we expect the above to place a generated object in the context
 			Assertion assertion = ctx.getGeneratedObject(Assertion.ID);
 
+			//context and type properties
+			CredentialEnum type = assertion.getCredentialType();
+			for(Probe<JsonNode> probe : List.of(new ContextPropertyProbe(type), new TypePropertyProbe(type))) {
+				probeCount++;
+				accumulator.add(probe.run(assertion.getJson(), ctx));
+				if(broken(accumulator)) return abort(ctx, accumulator, probeCount);
+			}
+
 			// let's compact
 			accumulator.add(getCompactionProbe(assertion).run(assertion, ctx));
 			if(broken(accumulator, true)) return abort(ctx, accumulator, probeCount);
@@ -108,14 +116,6 @@ public class OB20Inspector extends Inspector {
 			accumulator.add(new JsonLDValidationProbe(jsonLdGeneratedObject).run(assertion, ctx));
 			if(broken(accumulator, true)) return abort(ctx, accumulator, probeCount);
 
-			//context and type properties
-			CredentialEnum type = assertion.getCredentialType();
-			for(Probe<JsonNode> probe : List.of(new ContextPropertyProbe(type), new TypePropertyProbe(type))) {
-				probeCount++;
-				accumulator.add(probe.run(assertion.getJson(), ctx));
-				if(broken(accumulator)) return abort(ctx, accumulator, probeCount);
-			}
-
 			//canonical schema and inline schemata
 			// SchemaKey schema = assertion.getSchemaKey().orElseThrow();
 			// for(Probe<JsonNode> probe : List.of(new JsonSchemaProbe(schema), new InlineJsonSchemaProbe(schema))) {
diff --git a/inspector-vc/src/test/java/org/oneedtech/inspect/vc/OB20Tests.java b/inspector-vc/src/test/java/org/oneedtech/inspect/vc/OB20Tests.java
index 84245cb..4325443 100644
--- a/inspector-vc/src/test/java/org/oneedtech/inspect/vc/OB20Tests.java
+++ b/inspector-vc/src/test/java/org/oneedtech/inspect/vc/OB20Tests.java
@@ -1,6 +1,9 @@
 package org.oneedtech.inspect.vc;
 
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.oneedtech.inspect.test.Assertions.assertFatalCount;
+import static org.oneedtech.inspect.test.Assertions.assertHasProbeID;
+import static org.oneedtech.inspect.test.Assertions.assertInvalid;
 import static org.oneedtech.inspect.test.Assertions.assertValid;
 import static org.oneedtech.inspect.test.Assertions.assertWarning;
 
@@ -13,6 +16,7 @@ import org.junit.jupiter.api.Test;
 import org.oneedtech.inspect.core.Inspector.Behavior;
 import org.oneedtech.inspect.core.report.Report;
 import org.oneedtech.inspect.test.PrintHelper;
+import org.oneedtech.inspect.vc.probe.ContextPropertyProbe;
 import org.oneedtech.inspect.vc.util.TestOB20Inspector.TestBuilder;
 
 public class OB20Tests {
@@ -39,6 +43,17 @@ public class OB20Tests {
 		});
 	}
 
+	@Test
+	void testSimpleJsonInvalidContext() {
+		assertDoesNotThrow(()->{
+			Report report = validator.run(Samples.OB20.JSON.SIMPLE_ASSERTION_INVALID_CONTEXT_JSON.asFileResource());
+			if(verbose) PrintHelper.print(report, true);
+			assertInvalid(report);
+			assertFatalCount(report, 1);
+			assertHasProbeID(report, ContextPropertyProbe.ID, true);
+		});
+	}
+
 	@Test
 	void testSimplePNGPlainValid() {
 		assertDoesNotThrow(()->{
diff --git a/inspector-vc/src/test/java/org/oneedtech/inspect/vc/Samples.java b/inspector-vc/src/test/java/org/oneedtech/inspect/vc/Samples.java
index 0492c38..c628249 100644
--- a/inspector-vc/src/test/java/org/oneedtech/inspect/vc/Samples.java
+++ b/inspector-vc/src/test/java/org/oneedtech/inspect/vc/Samples.java
@@ -45,6 +45,7 @@ public class Samples {
 		public static final class JSON {
 			//  original: test_verify: test_verify_function
 			public final static Sample SIMPLE_ASSERTION_JSON = new Sample("ob20/basic-assertion.json", true);
+			public final static Sample SIMPLE_ASSERTION_INVALID_CONTEXT_JSON = new Sample("ob20/basic-assertion-invalid-context.json", true);
 			// original: test_graph: test_verify_with_redirection
 			public final static Sample WARNING_REDIRECTION_ASSERTION_JSON = new Sample("ob20/warning-with-redirection.json", true);
 			// original: test_validation: test_can_input_badgeclass
diff --git a/inspector-vc/src/test/resources/ob20/basic-assertion-invalid-context.json b/inspector-vc/src/test/resources/ob20/basic-assertion-invalid-context.json
new file mode 100644
index 0000000..b1de0b9
--- /dev/null
+++ b/inspector-vc/src/test/resources/ob20/basic-assertion-invalid-context.json
@@ -0,0 +1,18 @@
+{
+  "@context": "https://w3id.org/openbadges/invalid",
+  "type": "Assertion",
+  "id": "https://example.org/beths-robotics-badge.json",
+  "recipient": {
+    "type": "email",
+    "hashed": true,
+    "salt": "deadsea",
+    "identity": "sha256$ecf5409f3f4b91ab60cc5ef4c02aef7032354375e70cf4d8e43f6a1d29891942"
+  },
+  "image": "https://example.org/beths-robot-badge.png",
+  "evidence": "https://example.org/beths-robot-work.html",
+  "issuedOn": "2016-12-31T23:59:59Z",
+  "badge": "https://example.org/robotics-badge.json",
+  "verification": {
+    "type": "hosted"
+  }
+}
\ No newline at end of file