diff --git a/spec/tests/test-hyperscript-behavioral.sx b/spec/tests/test-hyperscript-behavioral.sx
index 96f8296a..e1c0aab7 100644
--- a/spec/tests/test-hyperscript-behavioral.sx
+++ b/spec/tests/test-hyperscript-behavioral.sx
@@ -6696,9 +6696,11 @@
 ;; ── collectionExpressions (22 tests) ──
 (defsuite "hs-upstream-collectionExpressions"
   (deftest "filters an array by condition"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= (list "a" "c") (eval-hs "set arr to [{name: \"a\", active: true}, {name: \"b\", active: false}, {name: \"c\", active: true}] then return arr where its active"))
+  )
   (deftest "filters with comparison"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= (list 4 5) (eval-hs "set arr to [1, 2, 3, 4, 5] then return arr where it > 3"))
+  )
   (deftest "works with DOM elements"
     (hs-cleanup!)
     (let ((_el-list (dom-create-element "ul")) (_el-button (dom-create-element "button")) (_el-out (dom-create-element "div")))
@@ -6713,23 +6715,32 @@
       (assert= "AC" (dom-text-content (dom-query-by-id "out")))
     ))
   (deftest "sorts by a property"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= (list "Alice" "Bob" "Charlie") (eval-hs "set arr to [{name: \"Charlie\"}, {name: \"Alice\"}, {name: \"Bob\"}] then return arr sorted by its name"))
+  )
   (deftest "sorts descending"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= (list 3 2 1) (eval-hs "set arr to [3, 1, 2] then return arr sorted by it descending"))
+  )
   (deftest "sorts numbers by a computed key"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= (list "a" "c" "b") (eval-hs "set arr to [{name: \"b\", age: 30}, {name: \"a\", age: 20}, {name: \"c\", age: 25}] then return arr sorted by its age"))
+  )
   (deftest "maps to a property"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= (list "Alice" "Bob") (eval-hs "set arr to [{name: \"Alice\"}, {name: \"Bob\"}] then return arr mapped to its name"))
+  )
   (deftest "maps with an expression"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= (list 2 4 6) (eval-hs "set arr to [1, 2, 3] then return arr mapped to (it * 2)"))
+  )
   (deftest "where then mapped to"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= (list "Alice" "Charlie") (eval-hs "set arr to [{name: \"Alice\", active: true}, {name: \"Bob\", active: false}, {name: \"Charlie\", active: true}] then return arr where its active mapped to its name"))
+  )
   (deftest "sorted by then mapped to"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= (list "Alice" "Charlie") (eval-hs "set arr to [{name: \"Charlie\", age: 30}, {name: \"Alice\", age: 20}] then return arr sorted by its age mapped to its name"))
+  )
   (deftest "where then sorted by then mapped to"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= (list "Bob" "Charlie") (eval-hs "set arr to [{name: \"Charlie\", active: true, age: 30}, {name: \"Alice\", active: false, age: 20}, {name: \"Bob\", active: true, age: 25}] then return arr where its active sorted by its age mapped to its name"))
+  )
   (deftest "the result inside where refers to previous command result, not current element"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= (list 4 5) (eval-hs "get 3 then set arr to [1, 2, 3, 4, 5] then return arr where it > the result"))
+  )
   (deftest "where binds after in without parens"
     (hs-cleanup!)
     (let ((_el-container (dom-create-element "div")))
@@ -6810,19 +6821,26 @@
 ;; ── splitJoin (7 tests) ──
 (defsuite "hs-upstream-splitJoin"
   (deftest "splits a string by delimiter"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= (list "a" "b" "c") (eval-hs "return \"a,b,c\" split by \",\""))
+  )
   (deftest "splits by whitespace"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= (list "hello" "world") (eval-hs "return \"hello world\" split by \" \""))
+  )
   (deftest "joins an array with delimiter"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= "a, b, c" (eval-hs "return [\"a\", \"b\", \"c\"] joined by \", \""))
+  )
   (deftest "joins with empty string"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= "xyz" (eval-hs "return [\"x\", \"y\", \"z\"] joined by \"\""))
+  )
   (deftest "split then where then joined"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= "a-b-c" (eval-hs "return \"a,,b,,c\" split by \",\" where it is not \"\" joined by \"-\""))
+  )
   (deftest "split then sorted then joined"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= "apple, banana, cherry" (eval-hs "return \"banana,apple,cherry\" split by \",\" sorted by it joined by \", \""))
+  )
   (deftest "split then mapped then joined"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= "5,5" (eval-hs "return \"hello world\" split by \" \" mapped to its length joined by \",\""))
+  )
 )
 
 ;; ── component (19 tests) ──
@@ -7380,17 +7398,23 @@
   (deftest "converts value as Boolean"
     (assert= true (eval-hs "1 as Boolean"))
     (assert= false (eval-hs "0 as Boolean"))
+    (assert= false (eval-hs "'' as Boolean"))
+    (assert= true (eval-hs "'hello' as Boolean"))
   )
   (deftest "can use the a modifier if you like"
     (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
   (deftest "parses string as JSON to object"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= "bar" (eval-hs "'{\"foo\":\"bar\"}' as JSON"))
+  )
   (deftest "converts value as JSONString"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= "{"foo":"bar"}" (eval-hs "{foo:'bar'} as JSONString"))
+  )
   (deftest "pipe operator chains conversions"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= "bar" (eval-hs "{foo:'bar'} as JSONString | JSON"))
+  )
   (deftest "can use the an modifier if you'd like"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= "bar" (eval-hs "'{\"foo\":\"bar\"}' as an Object"))
+  )
   (deftest "collects duplicate text inputs into an array"
     (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
   (deftest "converts multiple selects with programmatically changed selections"
@@ -7485,33 +7509,69 @@
       (assert= "yes" (dom-text-content (dom-query-by-id "d1")))
     ))
   (deftest "is ignoring case works"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= true (eval-hs "'Hello' is 'hello' ignoring case"))
+    (assert= true (eval-hs "'Hello' is 'HELLO' ignoring case"))
+    (assert= false (eval-hs "'Hello' is 'world' ignoring case"))
+  )
   (deftest "is not ignoring case works"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= true (eval-hs "'Hello' is not 'world' ignoring case"))
+    (assert= false (eval-hs "'Hello' is not 'hello' ignoring case"))
+  )
   (deftest "contains ignoring case works"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= true (eval-hs "'Hello World' contains 'hello' ignoring case"))
+    (assert= true (eval-hs "'Hello World' contains 'WORLD' ignoring case"))
+    (assert= false (eval-hs "'Hello World' contains 'missing' ignoring case"))
+  )
   (deftest "matches ignoring case works"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= true (eval-hs "'Hello' matches 'hello' ignoring case"))
+    (assert= true (eval-hs "'Hello' matches 'HELLO' ignoring case"))
+  )
   (deftest "starts with works"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= true (eval-hs "'hello world' starts with 'hello'"))
+    (assert= false (eval-hs "'hello world' starts with 'world'"))
+    (assert= true (eval-hs "'hello' starts with 'hello'"))
+    (assert= false (eval-hs "'' starts with 'x'"))
+  )
   (deftest "ends with works"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= true (eval-hs "'hello world' ends with 'world'"))
+    (assert= false (eval-hs "'hello world' ends with 'hello'"))
+    (assert= true (eval-hs "'hello' ends with 'hello'"))
+    (assert= false (eval-hs "'' ends with 'x'"))
+  )
   (deftest "does not start with works"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= false (eval-hs "'hello world' does not start with 'hello'"))
+    (assert= true (eval-hs "'hello world' does not start with 'world'"))
+  )
   (deftest "does not end with works"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= false (eval-hs "'hello world' does not end with 'world'"))
+    (assert= true (eval-hs "'hello world' does not end with 'hello'"))
+  )
   (deftest "starts with null is false"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= false (eval-hs "null starts with 'x'"))
+    (assert= true (eval-hs "null does not start with 'x'"))
+  )
   (deftest "ends with null is false"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= false (eval-hs "null ends with 'x'"))
+    (assert= true (eval-hs "null does not end with 'x'"))
+  )
   (deftest "starts with ignoring case works"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= true (eval-hs "'Hello World' starts with 'hello' ignoring case"))
+    (assert= true (eval-hs "'Hello World' starts with 'HELLO' ignoring case"))
+    (assert= false (eval-hs "'Hello World' starts with 'world' ignoring case"))
+  )
   (deftest "ends with ignoring case works"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= true (eval-hs "'Hello World' ends with 'world' ignoring case"))
+    (assert= true (eval-hs "'Hello World' ends with 'WORLD' ignoring case"))
+    (assert= false (eval-hs "'Hello World' ends with 'hello' ignoring case"))
+  )
   (deftest "starts with coerces to string"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= true (eval-hs "123 starts with '12'"))
+    (assert= false (eval-hs "123 starts with '23'"))
+  )
   (deftest "ends with coerces to string"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= true (eval-hs "123 ends with '23'"))
+    (assert= false (eval-hs "123 ends with '12'"))
+  )
   (deftest "is between works"
     (assert= true (eval-hs "5 is between 1 and 10"))
     (assert= true (eval-hs "1 is between 1 and 10"))
@@ -7527,7 +7587,9 @@
     (assert= false (eval-hs "10 is not between 1 and 10"))
   )
   (deftest "between works with strings"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= true (eval-hs "'b' is between 'a' and 'c'"))
+    (assert= false (eval-hs "'d' is between 'a' and 'c'"))
+  )
   (deftest "I am between works"
     (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
   (deftest "I am not between works"
@@ -7585,8 +7647,10 @@
     ))
   (deftest "is really works without equal to"
     (assert= true (eval-hs "2 is really 2"))
+    (assert= false (eval-hs "2 is really '2'"))
   )
   (deftest "is not really works without equal to"
+    (assert= true (eval-hs "2 is not really '2'"))
     (assert= false (eval-hs "2 is not really 2"))
   )
   (deftest "is equal works without to"
@@ -7667,8 +7731,7 @@
 ;; ── in (1 tests) ──
 (defsuite "hs-upstream-in"
   (deftest "null value in array returns empty"
-    ;; toEqual: []
-  )
+    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
 )
 
 ;; ── logicalOperator (3 tests) ──
@@ -7684,25 +7747,23 @@
 ;; ── mathOperator (5 tests) ──
 (defsuite "hs-upstream-mathOperator"
   (deftest "array + array concats"
-    ;; toEqual: [1, 2, 3, 4]
-  )
-  (deftest "array + single value appends"
-    ;; toEqual: [1, 2, 3]
-  )
-  (deftest "array + array does not mutate original"
     (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+  (deftest "array + single value appends"
+    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+  (deftest "array + array does not mutate original"
+    (assert= (list 1 2) (eval-hs "set a to [1, 2] then set b to a + [3] then return a"))
+  )
   (deftest "array concat chains"
-    ;; toEqual: [1, 2, 3]
-  )
+    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
   (deftest "empty array + array works"
-    ;; toEqual: [1, 2]
-  )
+    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
 )
 
 ;; ── no (5 tests) ──
 (defsuite "hs-upstream-no"
   (deftest "no returns false for non-empty array"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= false (eval-hs "no ['thing']"))
+  )
   (deftest "no with where filters then checks emptiness"
     (assert= true (eval-hs "no [1, 2, 3] where it > 5"))
   )
@@ -7710,7 +7771,8 @@
     (assert= false (eval-hs "no [1, 2, 3] where it > 1"))
   )
   (deftest "no with where and is not"
-    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
+    (assert= false (eval-hs "no [1, 2, 3] where it is not 2"))
+  )
   (deftest "no with where on DOM elements"
     (hs-cleanup!)
     (let ((_el-box (dom-create-element "div")) (_el-button (dom-create-element "button")) (_el-out (dom-create-element "div")))
@@ -7728,8 +7790,7 @@
 ;; ── objectLiteral (1 tests) ──
 (defsuite "hs-upstream-objectLiteral"
   (deftest "allows trailing commas"
-    ;; toEqual: { "foo": true, "bar-baz": false }
-  )
+    (error "NOT IMPLEMENTED: test HTML could not be parsed into SX"))
 )
 
 ;; ── queryRef (1 tests) ──
diff --git a/test-results/.last-run.json b/test-results/.last-run.json
index cbcc1fba..ad15d7fb 100644
--- a/test-results/.last-run.json
+++ b/test-results/.last-run.json
@@ -1,4 +1,6 @@
 {
-  "status": "passed",
-  "failedTests": []
+  "status": "failed",
+  "failedTests": [
+    "1c2c0c67218972a8b3e8-5ab09db25e2a06899363"
+  ]
 }
\ No newline at end of file
diff --git a/tests/playwright/generate-sx-tests.py b/tests/playwright/generate-sx-tests.py
index c0d50ac8..beb9edfc 100644
--- a/tests/playwright/generate-sx-tests.py
+++ b/tests/playwright/generate-sx-tests.py
@@ -508,37 +508,116 @@ def generate_test_pw(test, elements, var_names, idx):
     return '\n'.join(lines)
 
 
+def js_val_to_sx(val):
+    """Convert a JS literal value to SX."""
+    val = val.strip()
+    if val == 'true': return 'true'
+    if val == 'false': return 'false'
+    if val in ('null', 'undefined'): return 'nil'
+    if val.startswith('"') or val.startswith("'"):
+        return '"' + val.strip("\"'") + '"'
+    # Arrays: [1, 2, 3] → (list 1 2 3)
+    if val.startswith('[') and val.endswith(']'):
+        inner = val[1:-1].strip()
+        if not inner:
+            return '(list)'
+        items = [js_val_to_sx(x.strip()) for x in split_top_level(inner)]
+        return '(list ' + ' '.join(items) + ')'
+    try:
+        float(val)
+        return val
+    except ValueError:
+        return f'"{val}"'
+
+
+def split_top_level(s):
+    """Split a string by commas, respecting brackets/quotes."""
+    parts = []
+    depth = 0
+    current = []
+    in_str = None
+    for ch in s:
+        if in_str:
+            current.append(ch)
+            if ch == in_str:
+                in_str = None
+        elif ch in ('"', "'"):
+            in_str = ch
+            current.append(ch)
+        elif ch in ('(', '[', '{'):
+            depth += 1
+            current.append(ch)
+        elif ch in (')', ']', '}'):
+            depth -= 1
+            current.append(ch)
+        elif ch == ',' and depth == 0:
+            parts.append(''.join(current))
+            current = []
+        else:
+            current.append(ch)
+    if current:
+        parts.append(''.join(current))
+    return parts
+
+
+def extract_hs_expr(raw):
+    """Clean a HS expression extracted from run() call."""
+    # Remove surrounding whitespace and newlines
+    expr = raw.strip().replace('\n', ' ').replace('\t', ' ')
+    # Collapse multiple spaces
+    expr = re.sub(r'\s+', ' ', expr)
+    # Escape quotes for SX string
+    expr = expr.replace('\\', '').replace('"', '\\"')
+    return expr
+
+
 def generate_eval_only_test(test, idx):
     """Generate SX deftest for no-HTML tests using eval-hs.
-    Parses body field for run("expr").toBe(val) / expect(run("expr")).toBe(val) patterns."""
+    Handles patterns:
+    - run("expr").toBe(val)
+    - expect(run("expr")).toBe(val)
+    - var result = await run(`expr`); expect(result).toBe(val)
+    - run("expr").toEqual([...])
+    - run("expr").toThrow()
+    """
     body = test.get('body', '')
     lines = []
-    lines.append(f'  (deftest "{test["name"]}"')
+    safe_name = test["name"].replace('"', "'")
+    lines.append(f'  (deftest "{safe_name}"')
 
-    # Extract run("expr").toBe(val) or expect(await run("expr")).toBe(val) patterns
     assertions = []
-    for m in re.finditer(r'(?:expect\()?(?:await\s+)?run\(["\x27]([^"\x27]+)["\x27]\)\)?\.toBe\(([^)]+)\)', body):
-        hs_expr = m.group(1).replace('\\', '').replace('"', '\\"')
-        expected = m.group(2).strip()
-        # Convert JS values to SX
-        if expected == 'true': expected_sx = 'true'
-        elif expected == 'false': expected_sx = 'false'
-        elif expected == 'null' or expected == 'undefined': expected_sx = 'nil'
-        elif expected.startswith('"') or expected.startswith("'"):
-            expected_sx = '"' + expected.strip("\"'") + '"'
-        else:
-            try:
-                float(expected)
-                expected_sx = expected
-            except ValueError:
-                expected_sx = f'"{expected}"'
+
+    # Pattern 1: Inline — run("expr").toBe(val) or expect(run("expr")).toBe(val)
+    for m in re.finditer(
+        r'(?:expect\()?(?:await\s+)?run\((["\x27`])(.+?)\1\)\)?\.toBe\(([^)]+)\)',
+        body, re.DOTALL
+    ):
+        hs_expr = extract_hs_expr(m.group(2))
+        expected_sx = js_val_to_sx(m.group(3))
         assertions.append(f'    (assert= {expected_sx} (eval-hs "{hs_expr}"))')
 
-    # Also handle toEqual patterns
-    for m in re.finditer(r'(?:expect\()?(?:await\s+)?run\(["\x27]([^"\x27]+)["\x27]\)\)?\.toEqual\(([^)]+)\)', body):
-        hs_expr = m.group(1).replace('\\', '').replace('"', '\\"')
-        expected = m.group(2).strip()
-        assertions.append(f'    ;; toEqual: {expected[:40]}')
+    # Pattern 2: Two-line — var result = await run(`expr`); expect(result).toBe(val)
+    if not assertions:
+        run_match = re.search(
+            r'(?:var|let|const)\s+\w+\s*=\s*(?:await\s+)?run\((["\x27`])(.+?)\1\)',
+            body, re.DOTALL
+        )
+        if run_match:
+            hs_expr = extract_hs_expr(run_match.group(2))
+            for m in re.finditer(r'\.toBe\(([^)]+)\)', body):
+                expected_sx = js_val_to_sx(m.group(1))
+                assertions.append(f'    (assert= {expected_sx} (eval-hs "{hs_expr}"))')
+            for m in re.finditer(r'\.toEqual\((\[.*?\])\)', body, re.DOTALL):
+                expected_sx = js_val_to_sx(m.group(1))
+                assertions.append(f'    (assert= {expected_sx} (eval-hs "{hs_expr}"))')
+
+    # Pattern 3: toThrow — expect(() => run("expr")).toThrow()
+    for m in re.finditer(
+        r'run\((["\x27`])(.+?)\1\).*?\.toThrow\(\)',
+        body, re.DOTALL
+    ):
+        hs_expr = extract_hs_expr(m.group(2))
+        assertions.append(f'    (assert-throws (eval-hs "{hs_expr}"))')
 
     if not assertions:
         return None  # Can't convert this body pattern