diff --git a/Cargo.lock b/Cargo.lock
index 329df26b55..9cb7c2bd75 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1007,7 +1007,7 @@ dependencies = [
  "deno_lockfile",
  "deno_npm",
  "deno_runtime",
- "deno_semver",
+ "deno_semver 0.5.0",
  "deno_task_shell",
  "dissimilar",
  "dprint-plugin-json",
@@ -1196,7 +1196,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed5999e360fec39bbfee5d85bac82c5f557ed93a58660bc255026a90796138c6"
 dependencies = [
  "anyhow",
- "deno_semver",
+ "deno_semver 0.4.0",
  "indexmap 2.0.0",
  "jsonc-parser",
  "log",
@@ -1277,9 +1277,9 @@ dependencies = [
 
 [[package]]
 name = "deno_doc"
-version = "0.66.0"
+version = "0.67.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4cc42f49e0aa338e438f59b8367c0ca73c789e9321bd6e1ee086d57733826190"
+checksum = "2480971d683babc07eea6cdb37d1214675c25d084b0c819e2e52898634b044ce"
 dependencies = [
  "cfg-if 1.0.0",
  "deno_ast",
@@ -1295,9 +1295,9 @@ dependencies = [
 
 [[package]]
 name = "deno_emit"
-version = "0.27.0"
+version = "0.28.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae90c86c7cd7b828bc8503703dc06fa750a2f49ce7ae78968c04f91b244a6f31"
+checksum = "ebc68365e2e5ce6dd11506a1a17aac6a10ea7787e084c45690f70c46a6662fd8"
 dependencies = [
  "anyhow",
  "base64 0.13.1",
@@ -1362,15 +1362,15 @@ dependencies = [
 
 [[package]]
 name = "deno_graph"
-version = "0.54.0"
+version = "0.55.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dcb7464fab13748a26407d0250ab3fb412a88d8b95c30b8a96aa5d49c79d4ee6"
+checksum = "f09c93dac12402a37be3ee24e0b6a691ddc5fdef13831b375b6c0950efc89e40"
 dependencies = [
  "anyhow",
  "async-trait",
  "data-url",
  "deno_ast",
- "deno_semver",
+ "deno_semver 0.5.0",
  "futures",
  "indexmap 2.0.0",
  "monch",
@@ -1538,7 +1538,7 @@ dependencies = [
  "deno_media_type",
  "deno_net",
  "deno_npm",
- "deno_semver",
+ "deno_semver 0.5.0",
  "digest 0.10.7",
  "dsa",
  "ecb",
@@ -1588,14 +1588,14 @@ dependencies = [
 
 [[package]]
 name = "deno_npm"
-version = "0.14.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48ec636e8e1a92cb70b2451d9450698f1738f973b0436fe195cb934a51dcdb01"
+checksum = "b266a37deae9bc36785d44e9cc1c52d504940b89e5fea63b65119bef44b128a3"
 dependencies = [
  "anyhow",
  "async-trait",
  "deno_lockfile",
- "deno_semver",
+ "deno_semver 0.5.0",
  "futures",
  "log",
  "monch",
@@ -1691,6 +1691,19 @@ dependencies = [
  "url",
 ]
 
+[[package]]
+name = "deno_semver"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "594fd570fecc994ef602b96214f9d6c8ae11e60e29e37e89ab90af7f6b7f9d00"
+dependencies = [
+ "monch",
+ "once_cell",
+ "serde",
+ "thiserror",
+ "url",
+]
+
 [[package]]
 name = "deno_task_shell"
 version = "0.13.2"
@@ -2240,16 +2253,16 @@ dependencies = [
 
 [[package]]
 name = "eszip"
-version = "0.52.0"
+version = "0.53.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4baf8c2353535c8ba042249c73b80d289c2ea82cd1eee4838560fa96b77dc392"
+checksum = "cf1763e61b99be49c961817d2211fbcef23b04159a60895b208e4608beb20ee0"
 dependencies = [
  "anyhow",
  "base64 0.21.4",
  "deno_ast",
  "deno_graph",
  "deno_npm",
- "deno_semver",
+ "deno_semver 0.5.0",
  "futures",
  "hashlink",
  "serde",
diff --git a/Cargo.toml b/Cargo.toml
index e896d4c985..22b6aa4e85 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -48,8 +48,8 @@ deno_bench_util = { version = "0.112.0", path = "./bench_util" }
 test_util = { path = "./test_util" }
 deno_lockfile = "0.17.1"
 deno_media_type = { version = "0.1.1", features = ["module_specifier"] }
-deno_npm = "0.14.0"
-deno_semver = "0.4.0"
+deno_npm = "0.15.0"
+deno_semver = "0.5.0"
 
 # exts
 deno_broadcast_channel = { version = "0.112.0", path = "./ext/broadcast_channel" }
diff --git a/cli/Cargo.toml b/cli/Cargo.toml
index 58a45538a6..8c67d7b292 100644
--- a/cli/Cargo.toml
+++ b/cli/Cargo.toml
@@ -49,16 +49,16 @@ deno_ast = { workspace = true, features = ["bundler", "cjs", "codegen", "dep_gra
 deno_cache_dir = "=0.6.0"
 deno_config = "=0.3.1"
 deno_core = { workspace = true, features = ["include_js_files_for_snapshotting"] }
-deno_doc = "=0.66.0"
-deno_emit = "=0.27.0"
-deno_graph = "=0.54.0"
+deno_doc = "=0.67.0"
+deno_emit = "=0.28.0"
+deno_graph = "=0.55.0"
 deno_lint = { version = "=0.51.0", features = ["docs"] }
 deno_lockfile.workspace = true
 deno_npm.workspace = true
 deno_runtime = { workspace = true, features = ["dont_create_runtime_snapshot", "exclude_runtime_main_js", "include_js_files_for_snapshotting"] }
 deno_semver.workspace = true
 deno_task_shell = "=0.13.2"
-eszip = "=0.52.0"
+eszip = "=0.53.0"
 napi_sym.workspace = true
 
 async-trait.workspace = true
diff --git a/cli/cache/mod.rs b/cli/cache/mod.rs
index 58d4679d1c..1d6a799634 100644
--- a/cli/cache/mod.rs
+++ b/cli/cache/mod.rs
@@ -274,14 +274,19 @@ impl Loader for FetchCacher {
           }))
         })
         .unwrap_or_else(|err| {
-          if let Some(err) = err.downcast_ref::<std::io::Error>() {
-            if err.kind() == std::io::ErrorKind::NotFound {
+          if let Some(io_err) = err.downcast_ref::<std::io::Error>() {
+            if io_err.kind() == std::io::ErrorKind::NotFound {
               return Ok(None);
+            } else {
+              return Err(err);
             }
-          } else if get_error_class_name(&err) == "NotFound" {
-            return Ok(None);
           }
-          Err(err)
+          let error_class_name = get_error_class_name(&err);
+          match error_class_name {
+            "NotFound" => Ok(None),
+            "NotCached" if cache_setting == LoaderCacheSetting::Only => Ok(None),
+            _ => Err(err),
+          }
         })
     }
     .boxed()
diff --git a/cli/graph_util.rs b/cli/graph_util.rs
index 1a5a293a71..e567bebb58 100644
--- a/cli/graph_util.rs
+++ b/cli/graph_util.rs
@@ -32,6 +32,8 @@ use deno_graph::ResolutionError;
 use deno_graph::SpecifierError;
 use deno_runtime::deno_node;
 use deno_runtime::permissions::PermissionsContainer;
+use deno_semver::package::PackageNv;
+use deno_semver::package::PackageReq;
 use import_map::ImportMapError;
 use std::collections::HashMap;
 use std::collections::HashSet;
@@ -331,9 +333,7 @@ impl ModuleGraphBuilder {
         for (from, to) in &lockfile.content.redirects {
           if let Ok(from) = ModuleSpecifier::parse(from) {
             if let Ok(to) = ModuleSpecifier::parse(to) {
-              if !matches!(from.scheme(), "file" | "npm")
-                && !matches!(to.scheme(), "file" | "npm")
-              {
+              if !matches!(from.scheme(), "file" | "npm" | "jsr") {
                 graph.redirects.insert(from, to);
               }
             }
@@ -342,26 +342,25 @@ impl ModuleGraphBuilder {
       }
     }
 
-    // todo(dsherret): uncomment when adding deno: specifier support
-    // add the deno specifiers to the graph if it's the first time executing
-    // if graph.deno_specifiers.is_empty() {
-    //   if let Some(lockfile) = &self.lockfile {
-    //     let lockfile = lockfile.lock();
-    //     for (key, value) in &lockfile.content.packages.specifiers {
-    //       if let Some(key) = key
-    //         .strip_prefix("deno:")
-    //         .and_then(|key| PackageReq::from_str(key))
-    //       {
-    //         if let Ok(value) = value
-    //           .strip_prefix("deno:")
-    //           .and_then(|value| PackageNv::from_str(value))
-    //         {
-    //           graph.deno_specifiers.add(key, value);
-    //         }
-    //       }
-    //     }
-    //   }
-    // }
+    // add the jsr specifiers to the graph if it's the first time executing
+    if graph.packages.is_empty() {
+      if let Some(lockfile) = &self.lockfile {
+        let lockfile = lockfile.lock();
+        for (key, value) in &lockfile.content.packages.specifiers {
+          if let Some(key) = key
+            .strip_prefix("jsr:")
+            .and_then(|key| PackageReq::from_str(key).ok())
+          {
+            if let Some(value) = value
+              .strip_prefix("jsr:")
+              .and_then(|value| PackageNv::from_str(value).ok())
+            {
+              graph.packages.add(key, value);
+            }
+          }
+        }
+      }
+    }
 
     graph.build(roots, loader, options).await;
 
@@ -378,20 +377,19 @@ impl ModuleGraphBuilder {
       }
     }
 
-    // todo(dsherret): uncomment when adding support for deno specifiers
-    // add the deno specifiers in the graph to the lockfile
-    // if !graph.deno_specifiers.is_empty() {
-    //   if let Some(lockfile) = &self.lockfile {
-    //     let mappings = graph.deno_specifiers.mappings();
-    //     let mut lockfile = lockfile.lock();
-    //     for (from, to) in mappings {
-    //       lockfile.insert_package_specifier(
-    //         format!("deno:{}", from),
-    //         format!("deno:{}", to),
-    //       );
-    //     }
-    //   }
-    // }
+    // add the jsr specifiers in the graph to the lockfile
+    if !graph.packages.is_empty() {
+      if let Some(lockfile) = &self.lockfile {
+        let mappings = graph.packages.mappings();
+        let mut lockfile = lockfile.lock();
+        for (from, to) in mappings {
+          lockfile.insert_package_specifier(
+            format!("jsr:{}", from),
+            format!("jsr:{}", to),
+          );
+        }
+      }
+    }
 
     // ensure that the top level package.json is installed if a
     // specifier was matched in the package.json
diff --git a/cli/tests/integration/check_tests.rs b/cli/tests/integration/check_tests.rs
index 402f683c81..ca80ffa943 100644
--- a/cli/tests/integration/check_tests.rs
+++ b/cli/tests/integration/check_tests.rs
@@ -2,7 +2,6 @@
 
 use test_util as util;
 use util::env_vars_for_npm_tests;
-use util::env_vars_for_npm_tests_no_sync_download;
 use util::TestContext;
 use util::TestContextBuilder;
 
@@ -61,7 +60,7 @@ itest!(bundle_jsximportsource_importmap_config {
 itest!(jsx_not_checked {
   args: "check check/jsx_not_checked/main.jsx",
   output: "check/jsx_not_checked/main.out",
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   http_server: true,
   exit_code: 1,
 });
@@ -272,7 +271,7 @@ itest!(package_json_basic {
 itest!(package_json_fail_check {
   args: "check --quiet fail_check.ts",
   output: "package_json/basic/fail_check.check.out",
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   http_server: true,
   cwd: Some("package_json/basic"),
   copy_temp_dir: Some("package_json/basic"),
@@ -284,7 +283,7 @@ itest!(package_json_with_deno_json {
   output: "package_json/deno_json/main.check.out",
   cwd: Some("package_json/deno_json/"),
   copy_temp_dir: Some("package_json/deno_json/"),
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   http_server: true,
   exit_code: 1,
 });
diff --git a/cli/tests/integration/compile_tests.rs b/cli/tests/integration/compile_tests.rs
index f43b1cff98..657d17d7d0 100644
--- a/cli/tests/integration/compile_tests.rs
+++ b/cli/tests/integration/compile_tests.rs
@@ -792,10 +792,7 @@ fn dynamic_import_unanalyzable() {
 
 #[test]
 fn compile_npm_specifiers() {
-  let context = TestContextBuilder::for_npm()
-    .use_sync_npm_download()
-    .use_temp_cwd()
-    .build();
+  let context = TestContextBuilder::for_npm().use_temp_cwd().build();
 
   let temp_dir = context.temp_dir();
   temp_dir.write(
@@ -1012,10 +1009,7 @@ struct RunNpmBinCompileOptions<'a> {
 }
 
 fn run_npm_bin_compile_test(opts: RunNpmBinCompileOptions) {
-  let context = TestContextBuilder::for_npm()
-    .use_sync_npm_download()
-    .use_temp_cwd()
-    .build();
+  let context = TestContextBuilder::for_npm().use_temp_cwd().build();
 
   let temp_dir = context.temp_dir();
   let testdata_path = context.testdata_path();
@@ -1066,7 +1060,6 @@ fn run_npm_bin_compile_test(opts: RunNpmBinCompileOptions) {
 #[test]
 fn compile_node_modules_symlink_outside() {
   let context = TestContextBuilder::for_npm()
-    .use_sync_npm_download()
     .use_copy_temp_dir("compile/node_modules_symlink_outside")
     .cwd("compile/node_modules_symlink_outside")
     .build();
diff --git a/cli/tests/integration/info_tests.rs b/cli/tests/integration/info_tests.rs
index aeabf82080..bfba400804 100644
--- a/cli/tests/integration/info_tests.rs
+++ b/cli/tests/integration/info_tests.rs
@@ -1,7 +1,7 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
 use test_util as util;
-use util::env_vars_for_npm_tests_no_sync_download;
+use util::env_vars_for_npm_tests;
 use util::TestContextBuilder;
 
 #[test]
@@ -141,7 +141,7 @@ itest!(with_config_override {
 itest!(package_json_basic {
   args: "info --quiet main.ts",
   output: "package_json/basic/main.info.out",
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   http_server: true,
   cwd: Some("package_json/basic"),
   copy_temp_dir: Some("package_json/basic"),
diff --git a/cli/tests/integration/jsr_tests.rs b/cli/tests/integration/jsr_tests.rs
new file mode 100644
index 0000000000..d1706d84b1
--- /dev/null
+++ b/cli/tests/integration/jsr_tests.rs
@@ -0,0 +1,99 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+use deno_lockfile::Lockfile;
+use test_util as util;
+use util::env_vars_for_jsr_tests;
+use util::TestContextBuilder;
+
+itest!(no_module_graph_run {
+  args: "run jsr/no_module_graph/main.ts",
+  output: "jsr/no_module_graph/main.out",
+  envs: env_vars_for_jsr_tests(),
+  http_server: true,
+});
+
+itest!(no_module_graph_info {
+  args: "info jsr/no_module_graph/main.ts",
+  output: "jsr/no_module_graph/main_info.out",
+  envs: env_vars_for_jsr_tests(),
+  http_server: true,
+});
+
+itest!(same_package_multiple_versions {
+  args: "run --quiet jsr/no_module_graph/multiple.ts",
+  output: "jsr/no_module_graph/multiple.out",
+  envs: env_vars_for_jsr_tests(),
+  http_server: true,
+});
+
+itest!(module_graph_run {
+  args: "run jsr/module_graph/main.ts",
+  output: "jsr/module_graph/main.out",
+  envs: env_vars_for_jsr_tests(),
+  http_server: true,
+});
+
+itest!(module_graph_info {
+  args: "info jsr/module_graph/main.ts",
+  output: "jsr/module_graph/main_info.out",
+  envs: env_vars_for_jsr_tests(),
+  http_server: true,
+});
+
+itest!(deps_run {
+  args: "run jsr/deps/main.ts",
+  output: "jsr/deps/main.out",
+  envs: env_vars_for_jsr_tests(),
+  http_server: true,
+});
+
+itest!(deps_info {
+  args: "info jsr/deps/main.ts",
+  output: "jsr/deps/main_info.out",
+  envs: env_vars_for_jsr_tests(),
+  http_server: true,
+});
+
+itest!(version_not_found {
+  args: "run jsr/version_not_found/main.ts",
+  output: "jsr/version_not_found/main.out",
+  envs: env_vars_for_jsr_tests(),
+  http_server: true,
+  exit_code: 1,
+});
+
+#[test]
+fn specifiers_in_lockfile() {
+  let test_context = TestContextBuilder::for_jsr().use_temp_cwd().build();
+  let temp_dir = test_context.temp_dir();
+
+  temp_dir.write(
+    "main.ts",
+    r#"import version from "jsr:@denotest/no_module_graph@0.1/mod.ts";
+
+console.log(version);"#,
+  );
+  temp_dir.write("deno.json", "{}"); // to automatically create a lockfile
+
+  test_context
+    .new_command()
+    .args("run --quiet main.ts")
+    .run()
+    .assert_matches_text("0.1.1\n");
+
+  let lockfile_path = temp_dir.path().join("deno.lock");
+  let mut lockfile = Lockfile::new(lockfile_path.to_path_buf(), false).unwrap();
+  *lockfile
+    .content
+    .packages
+    .specifiers
+    .get_mut("jsr:@denotest/no_module_graph@0.1")
+    .unwrap() = "jsr:@denotest/no_module_graph@0.1.0".to_string();
+  lockfile_path.write(lockfile.as_json_string());
+
+  test_context
+    .new_command()
+    .args("run --quiet main.ts")
+    .run()
+    .assert_matches_text("0.1.0\n");
+}
diff --git a/cli/tests/integration/mod.rs b/cli/tests/integration/mod.rs
index 39a694c269..80b3164327 100644
--- a/cli/tests/integration/mod.rs
+++ b/cli/tests/integration/mod.rs
@@ -121,6 +121,7 @@ mod inspector;
 mod install;
 #[path = "js_unit_tests.rs"]
 mod js_unit_tests;
+mod jsr_tests;
 #[path = "lint_tests.rs"]
 mod lint;
 #[path = "lsp_tests.rs"]
diff --git a/cli/tests/integration/npm_tests.rs b/cli/tests/integration/npm_tests.rs
index ff600637c3..edd100d7db 100644
--- a/cli/tests/integration/npm_tests.rs
+++ b/cli/tests/integration/npm_tests.rs
@@ -8,7 +8,6 @@ use std::process::Stdio;
 use test_util as util;
 use util::assert_contains;
 use util::env_vars_for_npm_tests;
-use util::env_vars_for_npm_tests_no_sync_download;
 use util::http_server;
 use util::TestContextBuilder;
 
@@ -461,7 +460,7 @@ fn parallel_downloading() {
     ],
     None,
     // don't use the sync env var
-    Some(env_vars_for_npm_tests_no_sync_download()),
+    Some(env_vars_for_npm_tests()),
     true,
   );
   assert!(out.contains("chalk cjs loads"));
@@ -742,7 +741,7 @@ fn deno_run_cjs_module() {
 itest!(deno_run_cowsay {
   args: "run -A --quiet npm:cowsay@1.5.0 Hello",
   output: "npm/deno_run_cowsay.out",
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   http_server: true,
 });
 
@@ -750,21 +749,21 @@ itest!(deno_run_cowsay_with_node_modules_dir {
   args: "run -A --quiet --node-modules-dir npm:cowsay@1.5.0 Hello",
   temp_cwd: true,
   output: "npm/deno_run_cowsay.out",
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   http_server: true,
 });
 
 itest!(deno_run_cowsay_explicit {
   args: "run -A --quiet npm:cowsay@1.5.0/cowsay Hello",
   output: "npm/deno_run_cowsay.out",
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   http_server: true,
 });
 
 itest!(deno_run_cowthink {
   args: "run -A --quiet npm:cowsay@1.5.0/cowthink Hello",
   output: "npm/deno_run_cowthink.out",
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   http_server: true,
 });
 
@@ -1553,7 +1552,6 @@ fn auto_discover_lock_file() {
 #[test]
 fn peer_deps_with_copied_folders_and_lockfile() {
   let context = TestContextBuilder::for_npm()
-    .use_sync_npm_download()
     .use_copy_temp_dir("npm/peer_deps_with_copied_folders")
     .cwd("npm/peer_deps_with_copied_folders")
     .build();
@@ -1749,10 +1747,7 @@ fn reload_info_not_found_cache_but_exists_remote() {
 
   // This tests that when a local machine doesn't have a version
   // specified in a dependency that exists in the npm registry
-  let test_context = TestContextBuilder::for_npm()
-    .use_sync_npm_download()
-    .use_temp_cwd()
-    .build();
+  let test_context = TestContextBuilder::for_npm().use_temp_cwd().build();
   let deno_dir = test_context.deno_dir();
   let temp_dir = test_context.temp_dir();
   temp_dir.write(
@@ -1955,7 +1950,6 @@ fn reload_info_not_found_cache_but_exists_remote() {
 #[test]
 fn binary_package_with_optional_dependencies() {
   let context = TestContextBuilder::for_npm()
-    .use_sync_npm_download()
     .use_copy_temp_dir("npm/binary_package")
     .cwd("npm/binary_package")
     .build();
@@ -2171,7 +2165,7 @@ itest!(dynamic_import_json {
 itest!(check_package_file_dts_dmts_dcts {
   args: "check npm/file_dts_dmts_dcts/main.ts",
   output: "npm/file_dts_dmts_dcts/main.out",
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   http_server: true,
   exit_code: 1,
 });
@@ -2179,7 +2173,7 @@ itest!(check_package_file_dts_dmts_dcts {
 itest!(require_resolve_url_paths {
   args: "run -A --quiet --node-modules-dir url_paths.ts",
   output: "npm/require_resolve_url/url_paths.out",
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   http_server: true,
   exit_code: 0,
   cwd: Some("npm/require_resolve_url/"),
diff --git a/cli/tests/integration/run_tests.rs b/cli/tests/integration/run_tests.rs
index 0a5e86b1f8..1dff1f6d6a 100644
--- a/cli/tests/integration/run_tests.rs
+++ b/cli/tests/integration/run_tests.rs
@@ -15,7 +15,7 @@ use trust_dns_client::serialize::txt::Lexer;
 use trust_dns_client::serialize::txt::Parser;
 use util::assert_contains;
 use util::assert_not_contains;
-use util::env_vars_for_npm_tests_no_sync_download;
+use util::env_vars_for_npm_tests;
 use util::PathRef;
 use util::TestContext;
 use util::TestContextBuilder;
@@ -3122,7 +3122,7 @@ itest!(package_json_auto_discovered_for_local_script_arg {
   cwd: Some("run/with_package_json/"),
   // prevent creating a node_modules dir in the code directory
   copy_temp_dir: Some("run/with_package_json/"),
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   http_server: true,
 });
 
@@ -3134,7 +3134,7 @@ itest!(
     output: "run/with_package_json/with_stop/main.out",
     cwd: Some("run/with_package_json/"),
     copy_temp_dir: Some("run/with_package_json/"),
-    envs: env_vars_for_npm_tests_no_sync_download(),
+    envs: env_vars_for_npm_tests(),
     http_server: true,
     exit_code: 1,
   }
@@ -3165,7 +3165,7 @@ itest!(
     output: "run/with_package_json/no_deno_json/sub_dir/main.out",
     cwd: Some("run/with_package_json/no_deno_json/sub_dir"),
     copy_temp_dir: Some("run/with_package_json/no_deno_json/"),
-    envs: env_vars_for_npm_tests_no_sync_download(),
+    envs: env_vars_for_npm_tests(),
     http_server: true,
   }
 );
@@ -3175,7 +3175,7 @@ itest!(package_json_auto_discovered_for_npm_binary {
   output: "run/with_package_json/npm_binary/main.out",
   cwd: Some("run/with_package_json/npm_binary/"),
   copy_temp_dir: Some("run/with_package_json/"),
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   http_server: true,
 });
 
@@ -4565,21 +4565,21 @@ fn permission_prompt_strips_ansi_codes_and_control_chars() {
 itest!(node_builtin_modules_ts {
   args: "run --quiet --allow-read run/node_builtin_modules/mod.ts hello there",
   output: "run/node_builtin_modules/mod.ts.out",
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   exit_code: 0,
 });
 
 itest!(node_builtin_modules_js {
   args: "run --quiet --allow-read run/node_builtin_modules/mod.js hello there",
   output: "run/node_builtin_modules/mod.js.out",
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   exit_code: 0,
 });
 
 itest!(node_prefix_missing {
   args: "run --quiet run/node_prefix_missing/main.ts",
   output: "run/node_prefix_missing/main.ts.out",
-  envs: env_vars_for_npm_tests_no_sync_download(),
+  envs: env_vars_for_npm_tests(),
   exit_code: 1,
 });
 
diff --git a/cli/tests/testdata/jsr/deps/main.out b/cli/tests/testdata/jsr/deps/main.out
new file mode 100644
index 0000000000..388e1a6d56
--- /dev/null
+++ b/cli/tests/testdata/jsr/deps/main.out
@@ -0,0 +1,13 @@
+Download http://localhost:4545/jsr/registry/@denotest/deps/meta.json
+Download http://localhost:4545/jsr/registry/@denotest/deps/1.0.0_meta.json
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/meta.json
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/meta.json
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/1.4.0_meta.json
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.1_meta.json
+[UNORDERED_START]
+Download http://localhost:4545/jsr/registry/@denotest/deps/1.0.0/mod.ts
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/1.4.0/other.ts
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.1/mod.ts
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.1/TestClass.ts
+[UNORDERED_END]
+{ version: "0.1.1", other: Other {} }
diff --git a/cli/tests/testdata/jsr/deps/main.ts b/cli/tests/testdata/jsr/deps/main.ts
new file mode 100644
index 0000000000..25b13a6815
--- /dev/null
+++ b/cli/tests/testdata/jsr/deps/main.ts
@@ -0,0 +1,3 @@
+import value from "jsr:@denotest/deps/mod.ts";
+
+console.log(value);
diff --git a/cli/tests/testdata/jsr/deps/main_info.out b/cli/tests/testdata/jsr/deps/main_info.out
new file mode 100644
index 0000000000..c100e1363f
--- /dev/null
+++ b/cli/tests/testdata/jsr/deps/main_info.out
@@ -0,0 +1,22 @@
+Download http://localhost:4545/jsr/registry/@denotest/deps/meta.json
+Download http://localhost:4545/jsr/registry/@denotest/deps/1.0.0_meta.json
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/meta.json
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/meta.json
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/1.4.0_meta.json
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.1_meta.json
+[UNORDERED_START]
+Download http://localhost:4545/jsr/registry/@denotest/deps/1.0.0/mod.ts
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/1.4.0/other.ts
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.1/mod.ts
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.1/TestClass.ts
+[UNORDERED_END]
+local: [WILDCARD]main.ts
+type: TypeScript
+dependencies: 4 unique
+size: [WILDCARD]
+
+file:///[WILDCARD]main.ts ([WILDCARD])
+└─┬ http://localhost:4545/jsr/registry/@denotest/deps/1.0.0/mod.ts ([WILDCARD])
+  ├── http://localhost:4545/jsr/registry/@denotest/module_graph/1.4.0/other.ts ([WILDCARD])
+  └─┬ http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.1/mod.ts ([WILDCARD])
+    └── http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.1/TestClass.ts ([WILDCARD])
diff --git a/cli/tests/testdata/jsr/module_graph/main.out b/cli/tests/testdata/jsr/module_graph/main.out
new file mode 100644
index 0000000000..c1c8d039d3
--- /dev/null
+++ b/cli/tests/testdata/jsr/module_graph/main.out
@@ -0,0 +1,7 @@
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/meta.json
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/1.4.0_meta.json
+[UNORDERED_START]
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/1.4.0/other.ts
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/1.4.0/mod.ts
+[UNORDERED_END]
+Test { other: Other {} }
diff --git a/cli/tests/testdata/jsr/module_graph/main.ts b/cli/tests/testdata/jsr/module_graph/main.ts
new file mode 100644
index 0000000000..02052595c2
--- /dev/null
+++ b/cli/tests/testdata/jsr/module_graph/main.ts
@@ -0,0 +1,3 @@
+import { Test } from "jsr:@denotest/module_graph/mod.ts";
+
+console.log(new Test());
diff --git a/cli/tests/testdata/jsr/module_graph/main_info.out b/cli/tests/testdata/jsr/module_graph/main_info.out
new file mode 100644
index 0000000000..4bb8388ed5
--- /dev/null
+++ b/cli/tests/testdata/jsr/module_graph/main_info.out
@@ -0,0 +1,14 @@
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/meta.json
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/1.4.0_meta.json
+[UNORDERED_START]
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/1.4.0/mod.ts
+Download http://localhost:4545/jsr/registry/@denotest/module_graph/1.4.0/other.ts
+[UNORDERED_END]
+local: [WILDCARD]main.ts
+type: TypeScript
+dependencies: 2 unique
+size: [WILDCARD]
+
+file:///[WILDCARD]/module_graph/main.ts ([WILDCARD])
+└─┬ http://localhost:4545/jsr/registry/@denotest/module_graph/1.4.0/mod.ts ([WILDCARD])
+  └── http://localhost:4545/jsr/registry/@denotest/module_graph/1.4.0/other.ts ([WILDCARD])
diff --git a/cli/tests/testdata/jsr/no_module_graph/main.out b/cli/tests/testdata/jsr/no_module_graph/main.out
new file mode 100644
index 0000000000..70cae572d7
--- /dev/null
+++ b/cli/tests/testdata/jsr/no_module_graph/main.out
@@ -0,0 +1,6 @@
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/meta.json
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.0_meta.json
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.0/mod.ts
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.0/TestClass.ts
+0.1.0
+TestClass {}
diff --git a/cli/tests/testdata/jsr/no_module_graph/main.ts b/cli/tests/testdata/jsr/no_module_graph/main.ts
new file mode 100644
index 0000000000..ab1e781dc3
--- /dev/null
+++ b/cli/tests/testdata/jsr/no_module_graph/main.ts
@@ -0,0 +1,4 @@
+import version, { TestClass } from "jsr:@denotest/no_module_graph@0.1.0/mod.ts";
+
+console.log(version);
+console.log(new TestClass());
diff --git a/cli/tests/testdata/jsr/no_module_graph/main_info.out b/cli/tests/testdata/jsr/no_module_graph/main_info.out
new file mode 100644
index 0000000000..282e0580ce
--- /dev/null
+++ b/cli/tests/testdata/jsr/no_module_graph/main_info.out
@@ -0,0 +1,12 @@
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/meta.json
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.0_meta.json
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.0/mod.ts
+Download http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.0/TestClass.ts
+local: [WILDCARD]main.ts
+type: TypeScript
+dependencies: 2 unique
+size: [WILDCARD]
+
+file:///[WILDCARD]/jsr/no_module_graph/main.ts ([WILDCARD])
+└─┬ http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.0/mod.ts ([WILDCARD])
+  └── http://localhost:4545/jsr/registry/@denotest/no_module_graph/0.1.0/TestClass.ts ([WILDCARD])
diff --git a/cli/tests/testdata/jsr/no_module_graph/multiple.out b/cli/tests/testdata/jsr/no_module_graph/multiple.out
new file mode 100644
index 0000000000..8146276d08
--- /dev/null
+++ b/cli/tests/testdata/jsr/no_module_graph/multiple.out
@@ -0,0 +1,2 @@
+0.1.0
+0.2.0
diff --git a/cli/tests/testdata/jsr/no_module_graph/multiple.ts b/cli/tests/testdata/jsr/no_module_graph/multiple.ts
new file mode 100644
index 0000000000..0df32b7800
--- /dev/null
+++ b/cli/tests/testdata/jsr/no_module_graph/multiple.ts
@@ -0,0 +1,5 @@
+import version1 from "jsr:@denotest/no_module_graph@0.1.0/mod.ts";
+import version2 from "jsr:@denotest/no_module_graph@^0.2/mod.ts";
+
+console.log(version1);
+console.log(version2);
diff --git a/cli/tests/testdata/jsr/registry/@denotest/deps/1.0.0/mod.ts b/cli/tests/testdata/jsr/registry/@denotest/deps/1.0.0/mod.ts
new file mode 100644
index 0000000000..5b860b6030
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/deps/1.0.0/mod.ts
@@ -0,0 +1,7 @@
+import { Other } from "jsr:@denotest/module_graph@1/other.ts";
+import version from "jsr:@denotest/no_module_graph@^0.1/mod.ts";
+
+export default {
+  version,
+  other: new Other(),
+};
diff --git a/cli/tests/testdata/jsr/registry/@denotest/deps/1.0.0_meta.json b/cli/tests/testdata/jsr/registry/@denotest/deps/1.0.0_meta.json
new file mode 100644
index 0000000000..c6236b7df1
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/deps/1.0.0_meta.json
@@ -0,0 +1,17 @@
+{
+  "moduleGraph1": {
+    "/mod.ts": {
+      "dependencies": [{
+        "kind": "import",
+        "range": [[0, 0], [0, 62]],
+        "specifier": "jsr:@denotest/module_graph@1/other.ts",
+        "specifierRange": [[0, 22], [0, 61]]
+      }, {
+        "kind": "import",
+        "range": [[1, 0], [1, 64]],
+        "specifier": "jsr:@denotest/no_module_graph@^0.1/mod.ts",
+        "specifierRange": [[1, 20], [1, 63]]
+      }]
+    }
+  }
+}
diff --git a/cli/tests/testdata/jsr/registry/@denotest/deps/meta.json b/cli/tests/testdata/jsr/registry/@denotest/deps/meta.json
new file mode 100644
index 0000000000..02601e4d0d
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/deps/meta.json
@@ -0,0 +1,5 @@
+{
+  "versions": {
+    "1.0.0": {}
+  }
+}
diff --git a/cli/tests/testdata/jsr/registry/@denotest/module_graph/1.4.0/mod.ts b/cli/tests/testdata/jsr/registry/@denotest/module_graph/1.4.0/mod.ts
new file mode 100644
index 0000000000..cb3c4a5e02
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/module_graph/1.4.0/mod.ts
@@ -0,0 +1,5 @@
+import { Other } from "./other.ts";
+
+export class Test {
+  other = new Other();
+}
diff --git a/cli/tests/testdata/jsr/registry/@denotest/module_graph/1.4.0/other.ts b/cli/tests/testdata/jsr/registry/@denotest/module_graph/1.4.0/other.ts
new file mode 100644
index 0000000000..57e436cf88
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/module_graph/1.4.0/other.ts
@@ -0,0 +1,2 @@
+export class Other {
+}
diff --git a/cli/tests/testdata/jsr/registry/@denotest/module_graph/1.4.0_meta.json b/cli/tests/testdata/jsr/registry/@denotest/module_graph/1.4.0_meta.json
new file mode 100644
index 0000000000..d1e9a96b92
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/module_graph/1.4.0_meta.json
@@ -0,0 +1,13 @@
+{
+  "moduleGraph1": {
+    "/mod.ts": {
+      "dependencies": [{
+        "kind": "import",
+        "range": [[0, 0], [0, 35]],
+        "specifier": "./other.ts",
+        "specifierRange": [[0, 22], [0, 34]]
+      }]
+    },
+    "/other.ts": {}
+  }
+}
diff --git a/cli/tests/testdata/jsr/registry/@denotest/module_graph/meta.json b/cli/tests/testdata/jsr/registry/@denotest/module_graph/meta.json
new file mode 100644
index 0000000000..9a450c08b4
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/module_graph/meta.json
@@ -0,0 +1,6 @@
+{
+  "versions": {
+    "1.0.0": {},
+    "1.4.0": {}
+  }
+}
diff --git a/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.0/TestClass.ts b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.0/TestClass.ts
new file mode 100644
index 0000000000..88ac04c122
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.0/TestClass.ts
@@ -0,0 +1 @@
+export default class TestClass {}
diff --git a/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.0/mod.ts b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.0/mod.ts
new file mode 100644
index 0000000000..57600eb4b7
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.0/mod.ts
@@ -0,0 +1,3 @@
+export default "0.1.0";
+
+export { default as TestClass } from "./TestClass.ts";
diff --git a/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.0_meta.json b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.0_meta.json
new file mode 100644
index 0000000000..0967ef424b
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.0_meta.json
@@ -0,0 +1 @@
+{}
diff --git a/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.1/TestClass.ts b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.1/TestClass.ts
new file mode 100644
index 0000000000..88ac04c122
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.1/TestClass.ts
@@ -0,0 +1 @@
+export default class TestClass {}
diff --git a/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.1/mod.ts b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.1/mod.ts
new file mode 100644
index 0000000000..5e1fd94359
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.1/mod.ts
@@ -0,0 +1,3 @@
+export default "0.1.1";
+
+export { default as TestClass } from "./TestClass.ts";
diff --git a/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.1_meta.json b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.1_meta.json
new file mode 100644
index 0000000000..0967ef424b
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.1.1_meta.json
@@ -0,0 +1 @@
+{}
diff --git a/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.2.0/TestClass.ts b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.2.0/TestClass.ts
new file mode 100644
index 0000000000..88ac04c122
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.2.0/TestClass.ts
@@ -0,0 +1 @@
+export default class TestClass {}
diff --git a/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.2.0/mod.ts b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.2.0/mod.ts
new file mode 100644
index 0000000000..edf9622fb2
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.2.0/mod.ts
@@ -0,0 +1,3 @@
+export default "0.2.0";
+
+export { default as TestClass } from "./TestClass.ts";
diff --git a/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.2.0_meta.json b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.2.0_meta.json
new file mode 100644
index 0000000000..0967ef424b
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/0.2.0_meta.json
@@ -0,0 +1 @@
+{}
diff --git a/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/meta.json b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/meta.json
new file mode 100644
index 0000000000..0268b6c8aa
--- /dev/null
+++ b/cli/tests/testdata/jsr/registry/@denotest/no_module_graph/meta.json
@@ -0,0 +1,7 @@
+{
+  "versions": {
+    "0.1.0": {},
+    "0.1.1": {},
+    "0.2.0": {}
+  }
+}
diff --git a/cli/tests/testdata/jsr/version_not_found/main.out b/cli/tests/testdata/jsr/version_not_found/main.out
new file mode 100644
index 0000000000..ec9a2ee967
--- /dev/null
+++ b/cli/tests/testdata/jsr/version_not_found/main.out
@@ -0,0 +1,4 @@
+Download http://localhost:4545/jsr/registry/@denotest/deps/meta.json
+error: Could not find constraint in the list of versions: @denotest/deps@0.1.4
+  Specifier: jsr:@denotest/deps@0.1.4/mod.ts
+    at file:///[WILDCARD]/version_not_found/main.ts:1:19
diff --git a/cli/tests/testdata/jsr/version_not_found/main.ts b/cli/tests/testdata/jsr/version_not_found/main.ts
new file mode 100644
index 0000000000..a7673b7449
--- /dev/null
+++ b/cli/tests/testdata/jsr/version_not_found/main.ts
@@ -0,0 +1,2 @@
+import value from "jsr:@denotest/deps@0.1.4/mod.ts";
+console.log(value);
diff --git a/test_util/src/builders.rs b/test_util/src/builders.rs
index 769c054bf1..17871baa1d 100644
--- a/test_util/src/builders.rs
+++ b/test_util/src/builders.rs
@@ -15,7 +15,8 @@ use os_pipe::pipe;
 
 use crate::assertions::assert_wildcard_match;
 use crate::deno_exe_path;
-use crate::env_vars_for_npm_tests_no_sync_download;
+use crate::env_vars_for_jsr_tests;
+use crate::env_vars_for_npm_tests;
 use crate::fs::PathRef;
 use crate::http_server;
 use crate::lsp::LspClientBuilder;
@@ -50,6 +51,10 @@ impl TestContextBuilder {
     Self::new().use_http_server().add_npm_env_vars()
   }
 
+  pub fn for_jsr() -> Self {
+    Self::new().use_http_server().add_jsr_env_vars()
+  }
+
   pub fn temp_dir_path(mut self, path: impl AsRef<Path>) -> Self {
     self.temp_dir_path = Some(path.as_ref().to_path_buf());
     self
@@ -98,18 +103,17 @@ impl TestContextBuilder {
   }
 
   pub fn add_npm_env_vars(mut self) -> Self {
-    for (key, value) in env_vars_for_npm_tests_no_sync_download() {
+    for (key, value) in env_vars_for_npm_tests() {
       self = self.env(key, value);
     }
     self
   }
 
-  pub fn use_sync_npm_download(self) -> Self {
-    self.env(
-      // make downloads deterministic
-      "DENO_UNSTABLE_NPM_SYNC_DOWNLOAD",
-      "1",
-    )
+  pub fn add_jsr_env_vars(mut self) -> Self {
+    for (key, value) in env_vars_for_jsr_tests() {
+      self = self.env(key, value);
+    }
+    self
   }
 
   pub fn build(&self) -> TestContext {
diff --git a/test_util/src/lib.rs b/test_util/src/lib.rs
index 635520b44d..07ed558227 100644
--- a/test_util/src/lib.rs
+++ b/test_util/src/lib.rs
@@ -114,21 +114,18 @@ pub const PERMISSION_DENIED_PATTERN: &str = "PermissionDenied";
 static GUARD: Lazy<Mutex<HttpServerCount>> =
   Lazy::new(|| Mutex::new(HttpServerCount::default()));
 
-pub fn env_vars_for_npm_tests_no_sync_download() -> Vec<(String, String)> {
+pub fn env_vars_for_npm_tests() -> Vec<(String, String)> {
   vec![
     ("NPM_CONFIG_REGISTRY".to_string(), npm_registry_url()),
     ("NO_COLOR".to_string(), "1".to_string()),
   ]
 }
 
-pub fn env_vars_for_npm_tests() -> Vec<(String, String)> {
-  let mut env_vars = env_vars_for_npm_tests_no_sync_download();
-  env_vars.push((
-    // make downloads deterministic
-    "DENO_UNSTABLE_NPM_SYNC_DOWNLOAD".to_string(),
-    "1".to_string(),
-  ));
-  env_vars
+pub fn env_vars_for_jsr_tests() -> Vec<(String, String)> {
+  vec![
+    ("DENO_REGISTRY_URL".to_string(), jsr_registry_url()),
+    ("NO_COLOR".to_string(), "1".to_string()),
+  ]
 }
 
 pub fn root_path() -> PathRef {
@@ -168,6 +165,10 @@ pub fn npm_registry_unset_url() -> String {
   "http://NPM_CONFIG_REGISTRY.is.unset".to_string()
 }
 
+pub fn jsr_registry_url() -> String {
+  "http://localhost:4545/jsr/registry/".to_string()
+}
+
 pub fn std_path() -> PathRef {
   root_path().join("test_util").join("std")
 }
@@ -2620,6 +2621,21 @@ pub fn wildcard_match_detailed(
                 ))
               ));
             }
+            let actual_next_text = &current_text[max_found_index..];
+            let max_next_text_len = 40;
+            let next_text_len =
+              std::cmp::min(max_next_text_len, actual_next_text.len());
+            output_lines.push(format!(
+              "==== NEXT ACTUAL TEXT ====\n{}{}",
+              colors::red(annotate_whitespace(
+                &actual_next_text[..next_text_len]
+              )),
+              if actual_next_text.len() > max_next_text_len {
+                "[TRUNCATED]"
+              } else {
+                ""
+              },
+            ));
             return WildcardMatchResult::Fail(output_lines.join("\n"));
           }
         }
@@ -2673,9 +2689,13 @@ pub fn wildcard_match_detailed(
               colors::green(annotate_whitespace(expected))
             ));
             return WildcardMatchResult::Fail(output_lines.join("\n"));
+          } else {
+            output_lines.push(format!(
+              "<FOUND>{}</FOUND>",
+              colors::gray(annotate_whitespace(expected))
+            ));
           }
         }
-        output_lines.push("# Found matching unordered lines".to_string());
       }
     }
     was_last_wildcard = matches!(part, WildcardPatternPart::Wildcard);