diff --git a/tests/expand-manifest.jsonld b/tests/expand-manifest.jsonld
index c18f12bb..f09a7147 100644
--- a/tests/expand-manifest.jsonld
+++ b/tests/expand-manifest.jsonld
@@ -1819,6 +1819,13 @@
       "purpose": "The value of @type in an expanded term definition object MUST be a string or null.",
       "input": "expand/er55-in.jsonld",
       "expectErrorCode": "invalid type mapping"
+    }, {
+      "@id": "#ter56",
+      "@type": [ "jld:NegativeEvaluationTest", "jld:ExpandTest" ],
+      "name": "Invalid redefinition of @context keyword.",
+      "purpose": "Verifies that an exception is raised when attempting to redefine @context.",
+      "input": "expand/er56-in.jsonld",
+      "expectErrorCode": "keyword redefinition"
     }, {
       "@id": "#tes01",
       "@type": ["jld:NegativeEvaluationTest", "jld:ExpandTest"],
diff --git a/tests/expand/er56-in.jsonld b/tests/expand/er56-in.jsonld
new file mode 100644
index 00000000..157ec456
--- /dev/null
+++ b/tests/expand/er56-in.jsonld
@@ -0,0 +1,10 @@
+{
+  "@context": {
+    "@context": {
+      "p": "ex:p"
+    }
+  },
+  "@id": "ex:1",
+  "p": "value"
+}
+
diff --git a/tests/toRdf-manifest.jsonld b/tests/toRdf-manifest.jsonld
index b5448d5f..0fcc3354 100644
--- a/tests/toRdf-manifest.jsonld
+++ b/tests/toRdf-manifest.jsonld
@@ -2231,19 +2231,26 @@
       "expectErrorCode": "invalid @prefix value",
       "option": {"specVersion": "json-ld-1.1"}
     }, {
-     "@id": "#ter54",
-     "@type": [ "jld:NegativeEvaluationTest", "jld:ToRDFTest" ],
-     "name": "Invalid value object, multiple values for @type.",
-     "purpose": "The value of @type in a value object MUST be a string or null.",
-     "input": "toRdf/er54-in.jsonld",
-     "expectErrorCode": "invalid typed value"
-    }, {
-     "@id": "#ter55",
-     "@type": [ "jld:NegativeEvaluationTest", "jld:ToRDFTest" ],
-     "name": "Invalid term definition, multiple values for @type.",
-     "purpose": "The value of @type in an expanded term definition object MUST be a string or null.",
-     "input": "toRdf/er55-in.jsonld",
-     "expectErrorCode": "invalid type mapping"
+      "@id": "#ter54",
+      "@type": [ "jld:NegativeEvaluationTest", "jld:ToRDFTest" ],
+      "name": "Invalid value object, multiple values for @type.",
+      "purpose": "The value of @type in a value object MUST be a string or null.",
+      "input": "toRdf/er54-in.jsonld",
+      "expectErrorCode": "invalid typed value"
+    }, {
+      "@id": "#ter55",
+      "@type": [ "jld:NegativeEvaluationTest", "jld:ToRDFTest" ],
+      "name": "Invalid term definition, multiple values for @type.",
+      "purpose": "The value of @type in an expanded term definition object MUST be a string or null.",
+      "input": "toRdf/er55-in.jsonld",
+      "expectErrorCode": "invalid type mapping"
+    }, {
+      "@id": "#ter56",
+      "@type": [ "jld:NegativeEvaluationTest", "jld:ToRDFTest" ],
+      "name": "Invalid redefinition of @context keyword.",
+      "purpose": "Verifies that an exception is raised when attempting to redefine @context.",
+      "input": "expand/er56-in.jsonld",
+      "expectErrorCode": "keyword redefinition"
     }, {
       "@id": "#tin01",
       "@type": ["jld:PositiveEvaluationTest", "jld:ToRDFTest"],
diff --git a/tests/toRdf/er56-in.jsonld b/tests/toRdf/er56-in.jsonld
new file mode 100644
index 00000000..157ec456
--- /dev/null
+++ b/tests/toRdf/er56-in.jsonld
@@ -0,0 +1,10 @@
+{
+  "@context": {
+    "@context": {
+      "p": "ex:p"
+    }
+  },
+  "@id": "ex:1",
+  "p": "value"
+}
+