diff --git a/biscuit-auth/examples/testcases.rs b/biscuit-auth/examples/testcases.rs
index 24d6ec3d..fd8d6f8c 100644
--- a/biscuit-auth/examples/testcases.rs
+++ b/biscuit-auth/examples/testcases.rs
@@ -1991,11 +1991,13 @@ fn expressions_v4(target: &str, root: &KeyPair, test: bool) -> TestResult {
 
     let biscuit = biscuit!(
         r#"
+        //bool not strict equal
+        check if true !== false;
         //integer not strict equal
         check if 1 !== 3;
         //integer bitwise and or xor
         check if 1 | 2 ^ 3 === 0;
-        // string not strict equal
+        //string not strict equal
         check if "abcD12x" !== "abcD12";
         //date not strict equal
         check if 2022-12-04T09:46:41+00:00 !== 2020-12-04T09:46:41+00:00;
diff --git a/biscuit-auth/samples/README.md b/biscuit-auth/samples/README.md
index a0907504..16715eac 100644
--- a/biscuit-auth/samples/README.md
+++ b/biscuit-auth/samples/README.md
@@ -2460,6 +2460,7 @@ public keys: []
 block version: 4
 
 ```
+check if true !== false;
 check if 1 !== 3;
 check if 1 | 2 ^ 3 === 0;
 check if "abcD12x" !== "abcD12";
@@ -2476,7 +2477,7 @@ allow if true;
 ```
 
 revocation ids:
-- `117fa653744c859561555e6a6f5990e3a8e7817f91b87aa6991b6d64297158b4e884c92d10f49f74c96069df722aa676839b72751ca9d1fe83a7025b591de00b`
+- `9402c07923aa33bc911de80e61f388f5c4533e6b36e45317dc1db1e6bcc7664ed0c1c504d0ca8925208008961d95bbdbc36f6e3d91b3173369cc19ed625e9a0c`
 
 authorizer world:
 ```
@@ -2494,6 +2495,7 @@ World {
             "check if 1 | 2 ^ 3 === 0",
             "check if 2022-12-04T09:46:41Z !== 2020-12-04T09:46:41Z",
             "check if hex:12abcd !== hex:12ab",
+            "check if true !== false",
             "check if {1, 4} !== {1, 2}",
         ],
     },
diff --git a/biscuit-auth/samples/samples.json b/biscuit-auth/samples/samples.json
index 62db50bf..3366eaf4 100644
--- a/biscuit-auth/samples/samples.json
+++ b/biscuit-auth/samples/samples.json
@@ -2251,7 +2251,7 @@
           ],
           "public_keys": [],
           "external_key": null,
-          "code": "check if 1 !== 3;\ncheck if 1 | 2 ^ 3 === 0;\ncheck if \"abcD12x\" !== \"abcD12\";\ncheck if 2022-12-04T09:46:41Z !== 2020-12-04T09:46:41Z;\ncheck if hex:12abcd !== hex:12ab;\ncheck if {1, 4} !== {1, 2};\n",
+          "code": "check if true !== false;\ncheck if 1 !== 3;\ncheck if 1 | 2 ^ 3 === 0;\ncheck if \"abcD12x\" !== \"abcD12\";\ncheck if 2022-12-04T09:46:41Z !== 2020-12-04T09:46:41Z;\ncheck if hex:12abcd !== hex:12ab;\ncheck if {1, 4} !== {1, 2};\n",
           "version": 4
         }
       ],
@@ -2269,6 +2269,7 @@
                   "check if 1 | 2 ^ 3 === 0",
                   "check if 2022-12-04T09:46:41Z !== 2020-12-04T09:46:41Z",
                   "check if hex:12abcd !== hex:12ab",
+                  "check if true !== false",
                   "check if {1, 4} !== {1, 2}"
                 ]
               }
@@ -2282,7 +2283,7 @@
           },
           "authorizer_code": "allow if true;\n",
           "revocation_ids": [
-            "117fa653744c859561555e6a6f5990e3a8e7817f91b87aa6991b6d64297158b4e884c92d10f49f74c96069df722aa676839b72751ca9d1fe83a7025b591de00b"
+            "9402c07923aa33bc911de80e61f388f5c4533e6b36e45317dc1db1e6bcc7664ed0c1c504d0ca8925208008961d95bbdbc36f6e3d91b3173369cc19ed625e9a0c"
           ]
         }
       }
diff --git a/biscuit-auth/samples/test028_expressions_v4.bc b/biscuit-auth/samples/test028_expressions_v4.bc
index c34d7a10..7d94e82d 100644
Binary files a/biscuit-auth/samples/test028_expressions_v4.bc and b/biscuit-auth/samples/test028_expressions_v4.bc differ