diff --git a/boa_tester/src/exec/mod.rs b/boa_tester/src/exec/mod.rs
index 38d285b64f9..bbcaab75df6 100644
--- a/boa_tester/src/exec/mod.rs
+++ b/boa_tester/src/exec/mod.rs
@@ -57,17 +57,36 @@ impl TestSuite {
             println!();
         }
 
-        // Count passed tests
+        // Count passed tests and es specs
         let mut passed = 0;
         let mut ignored = 0;
         let mut panic = 0;
+        let mut es5_passed = 0;
+        let mut es6_passed = 0;
+        let mut es5_total = 0;
+        let mut es6_total = 0;
+
         for test in &tests {
             match test.result {
-                TestOutcomeResult::Passed => passed += 1,
+                TestOutcomeResult::Passed => {
+                    passed += 1;
+                    if test.es5 {
+                        es5_passed += 1;
+                    }
+                    if test.es6 {
+                        es6_passed += 1;
+                    }
+                }
                 TestOutcomeResult::Ignored => ignored += 1,
                 TestOutcomeResult::Panic => panic += 1,
                 TestOutcomeResult::Failed => {}
             }
+            if test.es5 {
+                es5_total += 1;
+            }
+            if test.es6 {
+                es6_total += 1;
+            }
         }
 
         // Count total tests
@@ -77,6 +96,10 @@ impl TestSuite {
             passed += suite.passed;
             ignored += suite.ignored;
             panic += suite.panic;
+            es5_total += suite.es5_total;
+            es6_total += suite.es6_total;
+            es5_passed += suite.es5_passed;
+            es6_passed += suite.es6_passed;
             features.append(&mut suite.features.clone());
         }
 
@@ -105,6 +128,10 @@ impl TestSuite {
             ignored,
             panic,
             suites,
+            es5_total,
+            es6_total,
+            es5_passed,
+            es6_passed,
             tests,
             features,
         }
@@ -141,6 +168,9 @@ impl Test {
             }
             return TestResult {
                 name: self.name.clone(),
+                es5: self.es5id.is_some(),
+                es6: self.es5id.is_some(),
+                spec_version: self.spec_version,
                 strict,
                 result: TestOutcomeResult::Failed,
                 result_text: Box::from("Could not read test file.")
@@ -159,6 +189,9 @@ impl Test {
             }
             return TestResult {
                 name: self.name.clone(),
+                es5: self.es5id.is_some(),
+                es6: self.es6id.is_some(),
+                spec_version: self.spec_version,
                 strict,
                 result: TestOutcomeResult::Ignored,
                 result_text: Box::default(),
@@ -357,6 +390,9 @@ impl Test {
 
         TestResult {
             name: self.name.clone(),
+            es5: self.es5id.is_some(),
+            es6: self.es6id.is_some(),
+            spec_version: self.spec_version,
             strict,
             result,
             result_text: result_text.into_boxed_str(),
diff --git a/boa_tester/src/main.rs b/boa_tester/src/main.rs
index 4b9b30231b6..997d8797325 100644
--- a/boa_tester/src/main.rs
+++ b/boa_tester/src/main.rs
@@ -286,6 +286,14 @@ fn run_test_suite(
             "Conformance: {:.2}%",
             (results.passed as f64 / results.total as f64) * 100.0
         );
+        println!(
+            "ES5 Conformance: {:.2}%",
+            (results.es5_passed as f64 / results.es5_total as f64) * 100.0
+        );
+        println!(
+            "ES6 Conformance: {:.2}%",
+            (results.es6_passed as f64 / results.es6_total as f64) * 100.0
+        );
 
         write_json(results, output, verbose)
             .wrap_err("could not write the results to the output JSON file")?;
@@ -331,6 +339,14 @@ struct SuiteResult {
     ignored: usize,
     #[serde(rename = "p")]
     panic: usize,
+    #[serde(rename = "5t")]
+    es5_total: usize,
+    #[serde(rename = "6t")]
+    es6_total: usize,
+    #[serde(rename = "5p")]
+    es5_passed: usize,
+    #[serde(rename = "6p")]
+    es6_passed: usize,
     #[serde(skip_serializing_if = "Vec::is_empty", default)]
     #[serde(rename = "s")]
     suites: Vec<SuiteResult>,
@@ -348,6 +364,12 @@ struct SuiteResult {
 struct TestResult {
     #[serde(rename = "n")]
     name: Box<str>,
+    #[serde(rename = "v", default)]
+    spec_version: Option<i8>,
+    #[serde(default)]
+    es5: bool,
+    #[serde(default)]
+    es6: bool,
     #[serde(rename = "s", default)]
     strict: bool,
     #[serde(skip)]
@@ -375,6 +397,9 @@ struct Test {
     name: Box<str>,
     description: Box<str>,
     esid: Option<Box<str>>,
+    spec_version: Option<i8>,
+    es5id: Option<Box<str>>,
+    es6id: Option<Box<str>>,
     flags: TestFlags,
     information: Box<str>,
     features: Box<[Box<str>]>,
@@ -392,10 +417,21 @@ impl Test {
         N: Into<Box<str>>,
         C: Into<Box<Path>>,
     {
+        let spec_version = if metadata.es5id.is_some() {
+            Some(5)
+        } else if metadata.es6id.is_some() {
+            Some(6)
+        } else {
+            None
+        };
+
         Self {
             name: name.into(),
             description: metadata.description,
             esid: metadata.esid,
+            spec_version,
+            es5id: metadata.es5id,
+            es6id: metadata.es6id,
             flags: metadata.flags.into(),
             information: metadata.info,
             features: metadata.features,