diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
index 2811349809e..335a1731002 100644
--- a/src/bootstrap/test.rs
+++ b/src/bootstrap/test.rs
@@ -1011,6 +1011,13 @@ note: if you're sure you want to do this, please open an issue as to why. In the
             cmd.arg("--rustdoc-path").arg(builder.rustdoc(compiler));
         }
 
+        if mode == "rustdoc-json" {
+            // Use the beta compiler for jsondocck
+            let json_compiler = compiler.with_stage(0);
+            cmd.arg("--jsondocck-path")
+                .arg(builder.ensure(tool::JsonDocCk { compiler: json_compiler, target }));
+        }
+
         if mode == "run-make" && suite.ends_with("fulldeps") {
             cmd.arg("--rust-demangler-path").arg(builder.tool_exe(Tool::RustDemangler));
         }
@@ -1072,8 +1079,6 @@ note: if you're sure you want to do this, please open an issue as to why. In the
 
         cmd.arg("--docck-python").arg(builder.python());
 
-        cmd.arg("--jsondocck-path").arg(builder.ensure(tool::JsonDocCk { compiler, target }));
-
         if builder.config.build.ends_with("apple-darwin") {
             // Force /usr/bin/python3 on macOS for LLDB tests because we're loading the
             // LLDB plugin's compiled module which only works with the system python
diff --git a/src/bootstrap/tool.rs b/src/bootstrap/tool.rs
index 999ce71ff6e..835b8beb0e7 100644
--- a/src/bootstrap/tool.rs
+++ b/src/bootstrap/tool.rs
@@ -367,7 +367,7 @@ bootstrap_tool!(
     RustdocTheme, "src/tools/rustdoc-themes", "rustdoc-themes";
     ExpandYamlAnchors, "src/tools/expand-yaml-anchors", "expand-yaml-anchors";
     LintDocs, "src/tools/lint-docs", "lint-docs";
-    JsonDocCk, "src/tools/jsondocck", "jsondocck", is_unstable_tool = true;
+    JsonDocCk, "src/tools/jsondocck", "jsondocck";
 );
 
 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq, Ord, PartialOrd)]
diff --git a/src/tools/compiletest/src/common.rs b/src/tools/compiletest/src/common.rs
index 4cefb562b13..5424889a838 100644
--- a/src/tools/compiletest/src/common.rs
+++ b/src/tools/compiletest/src/common.rs
@@ -199,7 +199,7 @@ pub struct Config {
     pub docck_python: String,
 
     /// The jsondocck executable.
-    pub jsondocck_path: String,
+    pub jsondocck_path: Option<String>,
 
     /// The LLVM `FileCheck` binary path.
     pub llvm_filecheck: Option<PathBuf>,
diff --git a/src/tools/compiletest/src/main.rs b/src/tools/compiletest/src/main.rs
index 8cb0342c1f8..688cf930033 100644
--- a/src/tools/compiletest/src/main.rs
+++ b/src/tools/compiletest/src/main.rs
@@ -60,7 +60,7 @@ pub fn parse_config(args: Vec<String>) -> Config {
         .optopt("", "rust-demangler-path", "path to rust-demangler to use in tests", "PATH")
         .reqopt("", "lldb-python", "path to python to use for doc tests", "PATH")
         .reqopt("", "docck-python", "path to python to use for doc tests", "PATH")
-        .reqopt("", "jsondocck-path", "path to jsondocck to use for doc tests", "PATH")
+        .optopt("", "jsondocck-path", "path to jsondocck to use for doc tests", "PATH")
         .optopt("", "valgrind-path", "path to Valgrind executable for Valgrind tests", "PROGRAM")
         .optflag("", "force-valgrind", "fail if Valgrind tests cannot be run under Valgrind")
         .optopt("", "run-clang-based-tests-with", "path to Clang executable", "PATH")
@@ -208,7 +208,7 @@ pub fn parse_config(args: Vec<String>) -> Config {
         rust_demangler_path: matches.opt_str("rust-demangler-path").map(PathBuf::from),
         lldb_python: matches.opt_str("lldb-python").unwrap(),
         docck_python: matches.opt_str("docck-python").unwrap(),
-        jsondocck_path: matches.opt_str("jsondocck-path").unwrap(),
+        jsondocck_path: matches.opt_str("jsondocck-path"),
         valgrind_path: matches.opt_str("valgrind-path"),
         force_valgrind: matches.opt_present("force-valgrind"),
         run_clang_based_tests_with: matches.opt_str("run-clang-based-tests-with"),
diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs
index b15a563a930..5608ff98417 100644
--- a/src/tools/compiletest/src/runtest.rs
+++ b/src/tools/compiletest/src/runtest.rs
@@ -2490,7 +2490,7 @@ impl<'test> TestCx<'test> {
         let mut json_out = out_dir.join(self.testpaths.file.file_stem().unwrap());
         json_out.set_extension("json");
         let res = self.cmd2procres(
-            Command::new(&self.config.jsondocck_path)
+            Command::new(self.config.jsondocck_path.as_ref().unwrap())
                 .arg("--doc-dir")
                 .arg(root.join(&out_dir))
                 .arg("--template")