diff --git a/internal/stage_p10.go b/internal/stage_p10.go
index 4d70c96..eb1d451 100644
--- a/internal/stage_p10.go
+++ b/internal/stage_p10.go
@@ -14,14 +14,24 @@ func testParseErrors(stageHarness *test_case_harness.TestCaseHarness) error {
 
 	logger := stageHarness.Logger
 
+	// Unterminated string
 	error1 := fmt.Sprintf("\"%s", random.RandomElementFromArray(STRINGS))
-	error2 := fmt.Sprintf("(%d +)", getRandInt())
-	error3 := "+"
+
+	// Unbalanced parentheses
+	error2 := "(foo"
+
+	// Missing operand
+	error3 := fmt.Sprintf("(%d +)", getRandInt())
+
+	// Missing operands
+	error4 := "+"
+
 	parseTestCase := testcases.MultiParseTestCase{
 		TestCases: []testcases.ParseTestCase{
 			{FileContents: error1, ExpectsError: true},
 			{FileContents: error2, ExpectsError: true},
 			{FileContents: error3, ExpectsError: true},
+			{FileContents: error4, ExpectsError: true},
 		},
 	}
 	return parseTestCase.RunAll(b, logger)
diff --git a/internal/stage_p4.go b/internal/stage_p4.go
index 344ff21..efa2c7e 100644
--- a/internal/stage_p4.go
+++ b/internal/stage_p4.go
@@ -1,6 +1,8 @@
 package internal
 
 import (
+	"fmt"
+
 	"github.com/codecrafters-io/interpreter-tester/internal/interpreter_executable"
 	testcases "github.com/codecrafters-io/interpreter-tester/internal/test_cases"
 	"github.com/codecrafters-io/tester-utils/test_case_harness"
@@ -14,13 +16,13 @@ func testParseParens(stageHarness *test_case_harness.TestCaseHarness) error {
 	parens1 := "(\"foo\")"
 	parens2 := "((true))"
 	parens3 := "(nil)"
-	parens4 := "(\"foo\""
+	parens4 := fmt.Sprintf("(%d.%d)", getRandInt(), getRandInt())
 	parseTestCase := testcases.MultiParseTestCase{
 		TestCases: []testcases.ParseTestCase{
 			{FileContents: parens1, ExpectsError: false},
 			{FileContents: parens2, ExpectsError: false},
 			{FileContents: parens3, ExpectsError: false},
-			{FileContents: parens4, ExpectsError: true},
+			{FileContents: parens4, ExpectsError: false},
 		},
 	}
 	return parseTestCase.RunAll(b, logger)
diff --git a/internal/test_helpers/fixtures/pass_parsing b/internal/test_helpers/fixtures/pass_parsing
index 5595c94..9766e1e 100644
--- a/internal/test_helpers/fixtures/pass_parsing
+++ b/internal/test_helpers/fixtures/pass_parsing
@@ -11,18 +11,25 @@ Debug = true
 [stage-10] [test-1] ✓ Received exit code 65.
 [stage-10] [test-2] Running test case: 2
 [stage-10] [test-2] Writing contents to ./test.lox:
-[stage-10] [test-2] [test.lox] (49 +)
+[stage-10] [test-2] [test.lox] (foo
 [stage-10] [test-2] $ ./your_program.sh parse test.lox
-[your_program] [line 1] Error at ')': Expect expression.
+[your_program] [line 1] Error at 'foo': Expect expression.
 [stage-10] [test-2] ✓ 1 line(s) match on stdout
 [stage-10] [test-2] ✓ Received exit code 65.
 [stage-10] [test-3] Running test case: 3
 [stage-10] [test-3] Writing contents to ./test.lox:
-[stage-10] [test-3] [test.lox] +
+[stage-10] [test-3] [test.lox] (49 +)
 [stage-10] [test-3] $ ./your_program.sh parse test.lox
-[your_program] [line 1] Error at '+': Expect expression.
+[your_program] [line 1] Error at ')': Expect expression.
 [stage-10] [test-3] ✓ 1 line(s) match on stdout
 [stage-10] [test-3] ✓ Received exit code 65.
+[stage-10] [test-4] Running test case: 4
+[stage-10] [test-4] Writing contents to ./test.lox:
+[stage-10] [test-4] [test.lox] +
+[stage-10] [test-4] $ ./your_program.sh parse test.lox
+[your_program] [line 1] Error at '+': Expect expression.
+[stage-10] [test-4] ✓ 1 line(s) match on stdout
+[stage-10] [test-4] ✓ Received exit code 65.
 [stage-10] Test passed.
 
 [stage-9] Running tests for Stage #9: ht8
@@ -204,40 +211,40 @@ Debug = true
 [stage-4] [test-3] ✓ Received exit code 0.
 [stage-4] [test-4] Running test case: 4
 [stage-4] [test-4] Writing contents to ./test.lox:
-[stage-4] [test-4] [test.lox] ("foo"
+[stage-4] [test-4] [test.lox] (11.95)
 [stage-4] [test-4] $ ./your_program.sh parse test.lox
-[your_program] [line 1] Error at end: Expect ')' after expression.
+[your_program] (group 11.95)
 [stage-4] [test-4] ✓ 1 line(s) match on stdout
-[stage-4] [test-4] ✓ Received exit code 65.
+[stage-4] [test-4] ✓ Received exit code 0.
 [stage-4] Test passed.
 
 [stage-3] Running tests for Stage #3: th5
 [stage-3] [test-1] Running test case: 1
 [stage-3] [test-1] Writing contents to ./test.lox:
-[stage-3] [test-1] [test.lox] "baz bar"
+[stage-3] [test-1] [test.lox] "quz foo"
 [stage-3] [test-1] $ ./your_program.sh parse test.lox
-[your_program] baz bar
+[your_program] quz foo
 [stage-3] [test-1] ✓ 1 line(s) match on stdout
 [stage-3] [test-1] ✓ Received exit code 0.
 [stage-3] [test-2] Running test case: 2
 [stage-3] [test-2] Writing contents to ./test.lox:
-[stage-3] [test-2] [test.lox] "'bar'"
+[stage-3] [test-2] [test.lox] "'foo'"
 [stage-3] [test-2] $ ./your_program.sh parse test.lox
-[your_program] 'bar'
+[your_program] 'foo'
 [stage-3] [test-2] ✓ 1 line(s) match on stdout
 [stage-3] [test-2] ✓ Received exit code 0.
 [stage-3] [test-3] Running test case: 3
 [stage-3] [test-3] Writing contents to ./test.lox:
-[stage-3] [test-3] [test.lox] "// baz"
+[stage-3] [test-3] [test.lox] "// quz"
 [stage-3] [test-3] $ ./your_program.sh parse test.lox
-[your_program] // baz
+[your_program] // quz
 [stage-3] [test-3] ✓ 1 line(s) match on stdout
 [stage-3] [test-3] ✓ Received exit code 0.
 [stage-3] [test-4] Running test case: 4
 [stage-3] [test-4] Writing contents to ./test.lox:
-[stage-3] [test-4] [test.lox] "72"
+[stage-3] [test-4] [test.lox] "90"
 [stage-3] [test-4] $ ./your_program.sh parse test.lox
-[your_program] 72
+[your_program] 90
 [stage-3] [test-4] ✓ 1 line(s) match on stdout
 [stage-3] [test-4] ✓ Received exit code 0.
 [stage-3] Test passed.
@@ -245,9 +252,9 @@ Debug = true
 [stage-2] Running tests for Stage #2: ra8
 [stage-2] [test-1] Running test case: 1
 [stage-2] [test-1] Writing contents to ./test.lox:
-[stage-2] [test-1] [test.lox] 83
+[stage-2] [test-1] [test.lox] 91
 [stage-2] [test-1] $ ./your_program.sh parse test.lox
-[your_program] 83.0
+[your_program] 91.0
 [stage-2] [test-1] ✓ 1 line(s) match on stdout
 [stage-2] [test-1] ✓ Received exit code 0.
 [stage-2] [test-2] Running test case: 2
@@ -259,9 +266,9 @@ Debug = true
 [stage-2] [test-2] ✓ Received exit code 0.
 [stage-2] [test-3] Running test case: 3
 [stage-2] [test-3] Writing contents to ./test.lox:
-[stage-2] [test-3] [test.lox] 90.91
+[stage-2] [test-3] [test.lox] 12.52
 [stage-2] [test-3] $ ./your_program.sh parse test.lox
-[your_program] 90.91
+[your_program] 12.52
 [stage-2] [test-3] ✓ 1 line(s) match on stdout
 [stage-2] [test-3] ✓ Received exit code 0.
 [stage-2] Test passed.