diff --git a/checker/src/test/java/dev/cel/checker/ExprCheckerTest.java b/checker/src/test/java/dev/cel/checker/ExprCheckerTest.java
index d5d5d9a3a..846201d32 100644
--- a/checker/src/test/java/dev/cel/checker/ExprCheckerTest.java
+++ b/checker/src/test/java/dev/cel/checker/ExprCheckerTest.java
@@ -517,6 +517,71 @@ public void jsonType() throws Exception {
     runTest();
   }
 
+  @Test
+  public void jsonTypeNullConstruction() throws Exception {
+    // Ok
+    source = "google.protobuf.Value{null_value: google.protobuf.NullValue.NULL_VALUE}";
+    runTest();
+
+    // Error
+    source = "google.protobuf.Value{null_value: null}";
+    runTest();
+
+    // Ok
+    source = "cel.expr.conformance.proto3.TestAllTypes{single_value: null}";
+    runTest();
+
+    // Ok but not expected (int coerced to double/json number 0.0)
+    source =
+        "cel.expr.conformance.proto3.TestAllTypes{single_value:"
+            + " google.protobuf.NullValue.NULL_VALUE}";
+    runTest();
+
+    // Error
+    source = "cel.expr.conformance.proto3.TestAllTypes{null_value: null}";
+    runTest();
+
+    // Ok
+    source =
+        "cel.expr.conformance.proto3.TestAllTypes{null_value:"
+            + " google.protobuf.NullValue.NULL_VALUE}";
+    runTest();
+  }
+
+  @Test
+  public void jsonTypeNullAccess() throws Exception {
+    source = "google.protobuf.Value{null_value: google.protobuf.NullValue.NULL_VALUE} == null";
+    runTest();
+
+    source = "cel.expr.conformance.proto3.TestAllTypes{single_value: null}.single_value == null";
+    runTest();
+
+    source =
+        "cel.expr.conformance.proto3.TestAllTypes{single_value:"
+            + " google.protobuf.NullValue.NULL_VALUE}.single_value == null";
+    runTest();
+
+    // Error
+    source =
+        "cel.expr.conformance.proto3.TestAllTypes{null_value:"
+            + " google.protobuf.NullValue.NULL_VALUE}.null_value == null";
+    runTest();
+
+    // Ok
+    source =
+        "cel.expr.conformance.proto3.TestAllTypes{null_value:"
+            + " google.protobuf.NullValue.NULL_VALUE}.null_value == 0";
+    runTest();
+
+    // Error
+    source = "google.protobuf.NullValue.NULL_VALUE == null";
+    runTest();
+
+    // Ok
+    source = "google.protobuf.NullValue.NULL_VALUE == 0";
+    runTest();
+  }
+
   // Call Style and User Functions
   // =============================
 
diff --git a/checker/src/test/resources/jsonTypeNullAccess.baseline b/checker/src/test/resources/jsonTypeNullAccess.baseline
new file mode 100644
index 000000000..834b8fde8
--- /dev/null
+++ b/checker/src/test/resources/jsonTypeNullAccess.baseline
@@ -0,0 +1,54 @@
+Source: google.protobuf.Value{null_value: google.protobuf.NullValue.NULL_VALUE} == null
+=====>
+_==_(
+  google.protobuf.Value{
+    null_value:google.protobuf.NullValue.NULL_VALUE~int^google.protobuf.NullValue.NULL_VALUE
+  }~dyn^google.protobuf.Value,
+  null~null
+)~bool^equals
+
+Source: cel.expr.conformance.proto3.TestAllTypes{single_value: null}.single_value == null
+=====>
+_==_(
+  cel.expr.conformance.proto3.TestAllTypes{
+    single_value:null~null
+  }~cel.expr.conformance.proto3.TestAllTypes^cel.expr.conformance.proto3.TestAllTypes.single_value~dyn,
+  null~null
+)~bool^equals
+
+Source: cel.expr.conformance.proto3.TestAllTypes{single_value: google.protobuf.NullValue.NULL_VALUE}.single_value == null
+=====>
+_==_(
+  cel.expr.conformance.proto3.TestAllTypes{
+    single_value:google.protobuf.NullValue.NULL_VALUE~int^google.protobuf.NullValue.NULL_VALUE
+  }~cel.expr.conformance.proto3.TestAllTypes^cel.expr.conformance.proto3.TestAllTypes.single_value~dyn,
+  null~null
+)~bool^equals
+
+Source: cel.expr.conformance.proto3.TestAllTypes{null_value: google.protobuf.NullValue.NULL_VALUE}.null_value == null
+=====>
+ERROR: test_location:1:103: found no matching overload for '_==_' applied to '(int, null)' (candidates: (%A0, %A0))
+ | cel.expr.conformance.proto3.TestAllTypes{null_value: google.protobuf.NullValue.NULL_VALUE}.null_value == null
+ | ......................................................................................................^
+
+Source: cel.expr.conformance.proto3.TestAllTypes{null_value: google.protobuf.NullValue.NULL_VALUE}.null_value == 0
+=====>
+_==_(
+  cel.expr.conformance.proto3.TestAllTypes{
+    null_value:google.protobuf.NullValue.NULL_VALUE~int^google.protobuf.NullValue.NULL_VALUE
+  }~cel.expr.conformance.proto3.TestAllTypes^cel.expr.conformance.proto3.TestAllTypes.null_value~int,
+  0~int
+)~bool^equals
+
+Source: google.protobuf.NullValue.NULL_VALUE == null
+=====>
+ERROR: test_location:1:38: found no matching overload for '_==_' applied to '(int, null)' (candidates: (%A0, %A0))
+ | google.protobuf.NullValue.NULL_VALUE == null
+ | .....................................^
+
+Source: google.protobuf.NullValue.NULL_VALUE == 0
+=====>
+_==_(
+  google.protobuf.NullValue.NULL_VALUE~int^google.protobuf.NullValue.NULL_VALUE,
+  0~int
+)~bool^equals
\ No newline at end of file
diff --git a/checker/src/test/resources/jsonTypeNullConstruction.baseline b/checker/src/test/resources/jsonTypeNullConstruction.baseline
new file mode 100644
index 000000000..5b9b211a8
--- /dev/null
+++ b/checker/src/test/resources/jsonTypeNullConstruction.baseline
@@ -0,0 +1,35 @@
+Source: google.protobuf.Value{null_value: google.protobuf.NullValue.NULL_VALUE}
+=====>
+google.protobuf.Value{
+  null_value:google.protobuf.NullValue.NULL_VALUE~int^google.protobuf.NullValue.NULL_VALUE
+}~dyn^google.protobuf.Value
+
+Source: google.protobuf.Value{null_value: null}
+=====>
+ERROR: test_location:1:33: expected type of field 'null_value' is 'int' but provided type is 'null'
+ | google.protobuf.Value{null_value: null}
+ | ................................^
+
+Source: cel.expr.conformance.proto3.TestAllTypes{single_value: null}
+=====>
+cel.expr.conformance.proto3.TestAllTypes{
+  single_value:null~null
+}~cel.expr.conformance.proto3.TestAllTypes^cel.expr.conformance.proto3.TestAllTypes
+
+Source: cel.expr.conformance.proto3.TestAllTypes{single_value: google.protobuf.NullValue.NULL_VALUE}
+=====>
+cel.expr.conformance.proto3.TestAllTypes{
+  single_value:google.protobuf.NullValue.NULL_VALUE~int^google.protobuf.NullValue.NULL_VALUE
+}~cel.expr.conformance.proto3.TestAllTypes^cel.expr.conformance.proto3.TestAllTypes
+
+Source: cel.expr.conformance.proto3.TestAllTypes{null_value: null}
+=====>
+ERROR: test_location:1:52: expected type of field 'null_value' is 'int' but provided type is 'null'
+ | cel.expr.conformance.proto3.TestAllTypes{null_value: null}
+ | ...................................................^
+
+Source: cel.expr.conformance.proto3.TestAllTypes{null_value: google.protobuf.NullValue.NULL_VALUE}
+=====>
+cel.expr.conformance.proto3.TestAllTypes{
+  null_value:google.protobuf.NullValue.NULL_VALUE~int^google.protobuf.NullValue.NULL_VALUE
+}~cel.expr.conformance.proto3.TestAllTypes^cel.expr.conformance.proto3.TestAllTypes
\ No newline at end of file
diff --git a/runtime/src/test/resources/jsonValueTypes.baseline b/runtime/src/test/resources/jsonValueTypes.baseline
index ff406cf94..cc840b24b 100644
--- a/runtime/src/test/resources/jsonValueTypes.baseline
+++ b/runtime/src/test/resources/jsonValueTypes.baseline
@@ -53,6 +53,46 @@ bindings: {x=single_value {
 }
 result:   true
 
+Source: google.protobuf.Value{string_value: 'hello'} == 'hello'
+declare x {
+  value cel.expr.conformance.proto3.TestAllTypes
+}
+=====>
+bindings: {}
+result:   true
+
+Source: google.protobuf.Value{number_value: 1.1} == 1.1
+declare x {
+  value cel.expr.conformance.proto3.TestAllTypes
+}
+=====>
+bindings: {}
+result:   true
+
+Source: google.protobuf.Value{null_value: google.protobuf.NullValue.NULL_VALUE} == null
+declare x {
+  value cel.expr.conformance.proto3.TestAllTypes
+}
+=====>
+bindings: {}
+result:   true
+
+Source: TestAllTypes{null_value: google.protobuf.NullValue.NULL_VALUE}.null_value == 0
+declare x {
+  value cel.expr.conformance.proto3.TestAllTypes
+}
+=====>
+bindings: {}
+result:   true
+
+Source: TestAllTypes{null_value: google.protobuf.NullValue.NULL_VALUE}.null_value != dyn(null)
+declare x {
+  value cel.expr.conformance.proto3.TestAllTypes
+}
+=====>
+bindings: {}
+result:   true
+
 Source: x.single_value[0] == [['hello'], -1.1][0]
 declare x {
   value cel.expr.conformance.proto3.TestAllTypes
@@ -148,5 +188,4 @@ bindings: {x=single_struct {
   }
 }
 }
-result:   {hello=val}
-
+result:   {hello=val}
\ No newline at end of file
diff --git a/testing/src/main/java/dev/cel/testing/BaseInterpreterTest.java b/testing/src/main/java/dev/cel/testing/BaseInterpreterTest.java
index 144ada5a8..b3c9af423 100644
--- a/testing/src/main/java/dev/cel/testing/BaseInterpreterTest.java
+++ b/testing/src/main/java/dev/cel/testing/BaseInterpreterTest.java
@@ -1850,6 +1850,23 @@ public void jsonValueTypes() {
     source = "x.single_value == 'hello'";
     runTest(ImmutableMap.of("x", xString));
 
+    // json manual construction
+    source = "google.protobuf.Value{string_value: 'hello'} == 'hello'";
+    runTest();
+
+    source = "google.protobuf.Value{number_value: 1.1} == 1.1";
+    runTest();
+
+    source = "google.protobuf.Value{null_value: google.protobuf.NullValue.NULL_VALUE} == null";
+    runTest();
+
+    // NULL_VALUE is not the same as null.
+    source = "TestAllTypes{null_value: google.protobuf.NullValue.NULL_VALUE}.null_value == 0";
+    runTest();
+    source =
+        "TestAllTypes{null_value: google.protobuf.NullValue.NULL_VALUE}.null_value != dyn(null)";
+    runTest();
+
     // JSON list equality.
     TestAllTypes xList =
         TestAllTypes.newBuilder()