diff --git a/.github/workflows/sqlx.yml b/.github/workflows/sqlx.yml
index a9a805002f..2083eebc1c 100644
--- a/.github/workflows/sqlx.yml
+++ b/.github/workflows/sqlx.yml
@@ -46,7 +46,7 @@ jobs:
       - uses: Swatinem/rust-cache@v1
         with:
           key: ${{ runner.os }}-check-${{ matrix.runtime }}-${{ matrix.tls }}
-          
+
       - uses: actions-rs/cargo@v1
         with:
           command: check
@@ -144,6 +144,8 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - run: mkdir /tmp/sqlite3-lib && wget -O /tmp/sqlite3-lib/ipaddr.so https://github.com/nalgeon/sqlean/releases/download/0.15.2/ipaddr.so
+
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
@@ -164,6 +166,8 @@ jobs:
             --test-threads=1
         env:
           DATABASE_URL: sqlite://tests/sqlite/sqlite.db
+          RUSTFLAGS: --cfg sqlite_ipaddr
+          LD_LIBRARY_PATH: /tmp/sqlite3-lib
 
   postgres:
     name: Postgres
diff --git a/tests/sqlite/sqlite.rs b/tests/sqlite/sqlite.rs
index cdcff0508c..914d4ff88a 100644
--- a/tests/sqlite/sqlite.rs
+++ b/tests/sqlite/sqlite.rs
@@ -204,6 +204,21 @@ async fn it_executes_with_pool() -> anyhow::Result<()> {
     Ok(())
 }
 
+#[cfg(sqlite_ipaddr)]
+#[sqlx_macros::test]
+async fn it_opens_with_extension() -> anyhow::Result<()> {
+    use std::str::FromStr;
+
+    let opts = SqliteConnectOptions::from_str(&dotenvy::var("DATABASE_URL")?)?.extension("ipaddr");
+
+    let mut conn = SqliteConnection::connect_with(&opts).await?;
+    conn.execute("SELECT ipmasklen('192.168.16.12/24');")
+        .await?;
+    conn.close().await?;
+
+    Ok(())
+}
+
 #[sqlx_macros::test]
 async fn it_opens_in_memory() -> anyhow::Result<()> {
     // If the filename is ":memory:", then a private, temporary in-memory database
diff --git a/tests/x.py b/tests/x.py
index 6b8785d83f..75791b5392 100755
--- a/tests/x.py
+++ b/tests/x.py
@@ -5,6 +5,8 @@
 import sys
 import time
 import argparse
+import platform
+import urllib.request
 from glob import glob
 from docker import start_database
 
@@ -23,6 +25,36 @@
 dir_tests = os.path.join(dir_workspace, "tests")
 
 
+def maybe_fetch_sqlite_extension():
+    """
+    For supported platforms, if we're testing SQLite and the file isn't
+    already present, grab a simple extension for testing.
+
+    Returns the extension name if it was downloaded successfully or `None` if not.
+    """
+    BASE_URL = "https://github.com/nalgeon/sqlean/releases/download/0.15.2/"
+    if platform.system() == "Darwin":
+        if platform.machine() == "arm64":
+            download_url = BASE_URL + "/ipaddr.arm64.dylib"
+            filename = "ipaddr.dylib"
+        else:
+            download_url = BASE_URL + "/ipaddr.dylib"
+            filename = "ipaddr.dylib"
+    elif platform.system() == "Linux":
+        download_url = BASE_URL + "/ipaddr.so"
+        filename = "ipaddr.so"
+    else:
+        # Unsupported OS
+        return None
+
+    if not os.path.exists(filename):
+        content = urllib.request.urlopen(download_url).read()
+        with open(filename, "wb") as fd:
+            fd.write(content)
+
+    return filename.split(".")[0]
+
+
 def run(command, comment=None, env=None, service=None, tag=None, args=None, database_url_args=None):
     if argv.list_targets:
         if tag:
@@ -41,6 +73,13 @@ def run(command, comment=None, env=None, service=None, tag=None, args=None, data
 
     environ = env or {}
 
+    if service == "sqlite":
+        if maybe_fetch_sqlite_extension() is not None:
+            if environ.get("RUSTFLAGS"):
+                environ["RUSTFLAGS"] += " --cfg sqlite_ipaddr"
+            else:
+                environ["RUSTFLAGS"] = "--cfg sqlite_ipaddr"
+
     if service is not None:
         database_url = start_database(service, database="sqlite/sqlite.db" if service == "sqlite" else "sqlx", cwd=dir_tests)