diff --git a/docs/CHANGELOG-v1.md b/docs/CHANGELOG-v1.md
index 01177f3952c..3e877237d5d 100644
--- a/docs/CHANGELOG-v1.md
+++ b/docs/CHANGELOG-v1.md
@@ -28,6 +28,12 @@ See [upgrade notes][1] for helpful information when upgrading from previous vers
 
 ## Unreleased
 
+What's changed since v1.31.1:
+
+- Bug fixes:
+  - Fixed nullable parameters with JValue null by @BernieWhite.
+    [#2535](https://github.com/Azure/PSRule.Rules.Azure/issues/2535)
+
 ## v1.31.1
 
 What's changed since v1.31.0:
diff --git a/src/PSRule.Rules.Azure/Data/Template/ExpressionHelpers.cs b/src/PSRule.Rules.Azure/Data/Template/ExpressionHelpers.cs
index 259f4d78c5e..04b001d2605 100644
--- a/src/PSRule.Rules.Azure/Data/Template/ExpressionHelpers.cs
+++ b/src/PSRule.Rules.Azure/Data/Template/ExpressionHelpers.cs
@@ -195,7 +195,7 @@ internal static bool TryIndex(object o, object index, out object value)
         internal static bool TryPropertyOrField(object o, string propertyName, out object value)
         {
             value = null;
-            if (o == null) return false;
+            if (IsNull(o)) return false;
 
             var resultType = o.GetType();
 
@@ -214,7 +214,7 @@ internal static bool TryPropertyOrField(object o, string propertyName, out objec
                 return true;
             }
 
-            if (o is JToken jToken)
+            if (o is JToken jToken && o is not JValue)
             {
                 var propertyToken = jToken[propertyName];
                 if (propertyToken == null)
diff --git a/tests/PSRule.Rules.Azure.Tests/TemplateVisitorTests.cs b/tests/PSRule.Rules.Azure.Tests/TemplateVisitorTests.cs
index 66daffa889f..10200110273 100644
--- a/tests/PSRule.Rules.Azure.Tests/TemplateVisitorTests.cs
+++ b/tests/PSRule.Rules.Azure.Tests/TemplateVisitorTests.cs
@@ -906,12 +906,16 @@ public void SymbolicDependsOn()
         public void NullableParameters()
         {
             var resources = ProcessTemplate(GetSourcePath("Tests.Bicep.27.json"), null, out _);
-            Assert.Equal(3, resources.Length);
+            Assert.Equal(4, resources.Length);
 
             var actual = resources[2];
             Assert.Equal("Microsoft.Storage/storageAccounts", actual["type"].Value<string>());
             Assert.Equal("TLS1_2", actual["properties"]["minimumTlsVersion"].Value<string>());
             Assert.Empty(actual["resources"][0]["properties"]["cors"]["corsRules"].Value<JArray>());
+
+            actual = resources[3];
+            Assert.Equal("Microsoft.KeyVault/vaults", actual["type"].Value<string>());
+            Assert.Empty(actual["properties"]["accessPolicies"].Value<JArray>());
         }
 
         [Fact]
diff --git a/tests/PSRule.Rules.Azure.Tests/Tests.Bicep.27.child.bicep b/tests/PSRule.Rules.Azure.Tests/Tests.Bicep.27.child.bicep
index c804f537959..5fa6541f3f9 100644
--- a/tests/PSRule.Rules.Azure.Tests/Tests.Bicep.27.child.bicep
+++ b/tests/PSRule.Rules.Azure.Tests/Tests.Bicep.27.child.bicep
@@ -12,6 +12,19 @@ type corsRule = {
   maxAgeInSeconds: int
 }[]?
 
+param accessPolicies array?
+
+@secure()
+param secrets object?
+
+var formattedAccessPolicies = [for accessPolicy in (accessPolicies ?? []): {
+  objectId: accessPolicy.objectId
+  tenantId: contains(accessPolicy, 'tenantId') ? accessPolicy.tenantId : tenant().tenantId
+  permissions: {}
+}]
+
+var secretList = secrets.?secureList ?? []
+
 resource storage 'Microsoft.Storage/storageAccounts@2023-01-01' = {
   name: 'test'
   #disable-next-line no-loc-expr-outside-params
@@ -33,3 +46,24 @@ resource storage 'Microsoft.Storage/storageAccounts@2023-01-01' = {
     }
   }
 }
+
+resource kv 'Microsoft.KeyVault/vaults@2023-07-01' = {
+  name: 'keyVault'
+  #disable-next-line no-loc-expr-outside-params
+  location: resourceGroup().location
+  properties: {
+    sku: {
+      family: 'A'
+      name: 'standard'
+    }
+    tenantId: tenant().tenantId
+    accessPolicies: formattedAccessPolicies
+  }
+}
+
+resource kvSecret 'Microsoft.KeyVault/vaults/secrets@2023-07-01' = [for item in secretList: {
+  name: item.name
+  properties: {
+    value: item.value
+  }
+}]
diff --git a/tests/PSRule.Rules.Azure.Tests/Tests.Bicep.27.json b/tests/PSRule.Rules.Azure.Tests/Tests.Bicep.27.json
index 8b2df10a7d1..59ffb248719 100644
--- a/tests/PSRule.Rules.Azure.Tests/Tests.Bicep.27.json
+++ b/tests/PSRule.Rules.Azure.Tests/Tests.Bicep.27.json
@@ -5,7 +5,7 @@
     "_generator": {
       "name": "bicep",
       "version": "0.23.1.45101",
-      "templateHash": "10495223775905612115"
+      "templateHash": "15341554075500882140"
     }
   },
   "resources": [
@@ -27,7 +27,7 @@
             "_generator": {
               "name": "bicep",
               "version": "0.23.1.45101",
-              "templateHash": "8612041935519591936"
+              "templateHash": "1045026030740697206"
             }
           },
           "definitions": {
@@ -75,8 +75,30 @@
             },
             "corsRules": {
               "$ref": "#/definitions/corsRule"
+            },
+            "accessPolicies": {
+              "type": "array",
+              "nullable": true
+            },
+            "secrets": {
+              "type": "secureObject",
+              "nullable": true
             }
           },
+          "variables": {
+            "copy": [
+              {
+                "name": "formattedAccessPolicies",
+                "count": "[length(coalesce(parameters('accessPolicies'), createArray()))]",
+                "input": {
+                  "objectId": "[coalesce(parameters('accessPolicies'), createArray())[copyIndex('formattedAccessPolicies')].objectId]",
+                  "tenantId": "[if(contains(coalesce(parameters('accessPolicies'), createArray())[copyIndex('formattedAccessPolicies')], 'tenantId'), coalesce(parameters('accessPolicies'), createArray())[copyIndex('formattedAccessPolicies')].tenantId, tenant().tenantId)]",
+                  "permissions": {}
+                }
+              }
+            ],
+            "secretList": "[coalesce(tryGet(parameters('secrets'), 'secureList'), createArray())]"
+          },
           "resources": {
             "storage::blob": {
               "type": "Microsoft.Storage/storageAccounts/blobServices",
@@ -103,6 +125,32 @@
               "properties": {
                 "minimumTlsVersion": "[coalesce(parameters('minTLSVersion'), 'TLS1_2')]"
               }
+            },
+            "kv": {
+              "type": "Microsoft.KeyVault/vaults",
+              "apiVersion": "2023-07-01",
+              "name": "keyVault",
+              "location": "[resourceGroup().location]",
+              "properties": {
+                "sku": {
+                  "family": "A",
+                  "name": "standard"
+                },
+                "tenantId": "[tenant().tenantId]",
+                "accessPolicies": "[variables('formattedAccessPolicies')]"
+              }
+            },
+            "kvSecret": {
+              "copy": {
+                "name": "kvSecret",
+                "count": "[length(variables('secretList'))]"
+              },
+              "type": "Microsoft.KeyVault/vaults/secrets",
+              "apiVersion": "2023-07-01",
+              "name": "[variables('secretList')[copyIndex()].name]",
+              "properties": {
+                "value": "[variables('secretList')[copyIndex()].value]"
+              }
             }
           }
         }