diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8eb2be917..45b4d4ed8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -60,9 +60,19 @@ jobs:
       - name: Build
         run: cargo build --workspace --locked
 
-      - name: Test
+      - name: fast tests
         run: cargo test --workspace --locked
 
+      - name: create small build-environment
+        run: |
+          docker build -t buildenv - < dockerfiles/Dockerfile-small-build-env
+
+      - name: slow tests
+        env:
+          DOCSRS_INCLUDE_DEFAULT_TARGETS: true
+          DOCS_RS_LOCAL_DOCKER_IMAGE: buildenv
+        run: cargo test --workspace --locked -- --ignored
+
       - name: Clean up the database
         run: docker-compose down --volumes
 
diff --git a/dockerfiles/Dockerfile-small-build-env b/dockerfiles/Dockerfile-small-build-env
new file mode 100644
index 000000000..118b375fc
--- /dev/null
+++ b/dockerfiles/Dockerfile-small-build-env
@@ -0,0 +1,6 @@
+FROM ubuntu:focal
+
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends apt-utils build-essential sudo git
+
+CMD ["bash"]
diff --git a/src/docbuilder/rustwide_builder.rs b/src/docbuilder/rustwide_builder.rs
index 1f2402d13..b62e75536 100644
--- a/src/docbuilder/rustwide_builder.rs
+++ b/src/docbuilder/rustwide_builder.rs
@@ -87,6 +87,9 @@ impl RustwideBuilder {
         if let Some(custom_image) = &config.local_docker_image {
             builder = builder.sandbox_image(SandboxImage::local(&custom_image)?);
         }
+        if cfg!(test) {
+            builder = builder.fast_init(true);
+        }
 
         let workspace = builder.init()?;
         workspace.purge_all_build_dirs()?;
@@ -753,3 +756,102 @@ pub(crate) struct BuildResult {
     pub(crate) docsrs_version: String,
     pub(crate) successful: bool,
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::test::{assert_redirect, assert_success, wrapper};
+
+    #[test]
+    #[ignore]
+    fn test_build_crate() {
+        wrapper(|env| {
+            let crate_ = DUMMY_CRATE_NAME;
+            let crate_path = crate_.replace("-", "_");
+            let version = DUMMY_CRATE_VERSION;
+            let default_target = "x86_64-unknown-linux-gnu";
+
+            assert_eq!(env.config().include_default_targets, true);
+
+            let mut builder = RustwideBuilder::init(env).unwrap();
+            builder
+                .build_package(crate_, version, PackageKind::CratesIo)
+                .map(|_| ())?;
+
+            // check release record in the db (default and other targets)
+            let mut conn = env.db().conn();
+            let rows = conn
+                .query(
+                    "SELECT 
+                        r.rustdoc_status,
+                        r.default_target,
+                        r.doc_targets
+                    FROM 
+                        crates as c 
+                        INNER JOIN releases AS r ON c.id = r.crate_id
+                    WHERE 
+                        c.name = $1 AND 
+                        r.version = $2",
+                    &[&crate_, &version],
+                )
+                .unwrap();
+            let row = rows.get(0).unwrap();
+
+            assert_eq!(row.get::<_, bool>("rustdoc_status"), true);
+            assert_eq!(row.get::<_, String>("default_target"), default_target);
+
+            let mut targets: Vec<String> = row
+                .get::<_, Value>("doc_targets")
+                .as_array()
+                .unwrap()
+                .iter()
+                .map(|v| v.as_str().unwrap().to_owned())
+                .collect();
+            targets.sort();
+            assert_eq!(
+                targets,
+                vec![
+                    "i686-pc-windows-msvc",
+                    "i686-unknown-linux-gnu",
+                    "x86_64-apple-darwin",
+                    "x86_64-pc-windows-msvc",
+                    "x86_64-unknown-linux-gnu",
+                ]
+            );
+
+            let storage = env.storage();
+            let web = env.frontend();
+
+            let base = format!("rustdoc/{}/{}", crate_, version);
+
+            // default target was built and is accessible
+            assert!(storage.exists(&format!("{}/{}/index.html", base, crate_path))?);
+            assert_success(&format!("/{}/{}/{}", crate_, version, crate_path), web)?;
+
+            // other targets too
+            for target in DEFAULT_TARGETS {
+                let target_docs_present =
+                    storage.exists(&format!("{}/{}/{}/index.html", base, target, crate_path))?;
+
+                let target_url = format!(
+                    "/{}/{}/{}/{}/index.html",
+                    crate_, version, target, crate_path
+                );
+
+                if target == &default_target {
+                    assert!(!target_docs_present);
+                    assert_redirect(
+                        &target_url,
+                        &format!("/{}/{}/{}/index.html", crate_, version, crate_path),
+                        web,
+                    )?;
+                } else {
+                    assert!(target_docs_present);
+                    assert_success(&target_url, web)?;
+                }
+            }
+
+            Ok(())
+        })
+    }
+}
diff --git a/src/test/mod.rs b/src/test/mod.rs
index 5e839ecc4..6bc3a6e82 100644
--- a/src/test/mod.rs
+++ b/src/test/mod.rs
@@ -13,6 +13,7 @@ use reqwest::{
     blocking::{Client, RequestBuilder},
     Method,
 };
+use std::fs;
 use std::{panic, sync::Arc};
 
 pub(crate) fn wrapper(f: impl FnOnce(&TestEnvironment) -> Result<(), Error>) {
@@ -103,10 +104,12 @@ pub(crate) struct TestEnvironment {
 }
 
 pub(crate) fn init_logger() {
-    // If this fails it's probably already initialized
-    let _ = env_logger::from_env(env_logger::Env::default().filter("DOCSRS_LOG"))
-        .is_test(true)
-        .try_init();
+    // initializing rustwide logging also sets the global logger
+    rustwide::logging::init_with(
+        env_logger::from_env(env_logger::Env::default().filter("DOCSRS_LOG"))
+            .is_test(true)
+            .build(),
+    );
 }
 
 impl TestEnvironment {
@@ -137,8 +140,11 @@ impl TestEnvironment {
     fn base_config(&self) -> Config {
         let mut config = Config::from_env().expect("failed to get base config");
 
+        // create index directory
+        fs::create_dir_all(config.registry_index_path.clone()).unwrap();
+
         // Use less connections for each test compared to production.
-        config.max_pool_size = 2;
+        config.max_pool_size = 4;
         config.min_pool_idle = 0;
 
         // Use the database for storage, as it's faster than S3.