Patch-Source: https://github.com/SeaDve/Kooha/pull/206
--
diff --git a/Cargo.lock b/Cargo.lock
index 9c784f2..b006acd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -134,6 +134,16 @@ version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5827cebf4670468b8772dd191856768aedcb1b0278a04f989f7766351917b9dc"
 
+[[package]]
+name = "ctor"
+version = "0.1.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d2301688392eb071b0bf1a37be05c469d3cc4dbbd95df672fe28ab021e6a096"
+dependencies = [
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "field-offset"
 version = "0.3.4"
@@ -761,6 +771,7 @@ name = "kooha"
 version = "2.2.2"
 dependencies = [
  "anyhow",
+ "ctor",
  "futures-channel",
  "futures-util",
  "gdk4-wayland",
diff --git a/Cargo.toml b/Cargo.toml
index 97518f5..66988ef 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,3 +27,6 @@ futures-util = { version = "0.3", default-features = false }
 gsettings-macro = "0.1.11"
 pulse = { package = "libpulse-binding", version = "2.26.0" }
 pulse_glib = { package = "libpulse-glib-binding", version = "2.25.1" }
+
+[dev-dependencies]
+ctor = "0.1.26"
diff --git a/src/main.rs b/src/main.rs
index 58a60bf..01c900c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -51,6 +51,10 @@ use self::{
     config::{GETTEXT_PACKAGE, LOCALEDIR, RESOURCES_FILE},
 };
 
+#[cfg(test)]
+#[macro_use]
+extern crate ctor;
+
 static THREAD_POOL: Lazy<glib::ThreadPool> = Lazy::new(|| glib::ThreadPool::shared(None).unwrap());
 
 fn main() {
@@ -72,3 +76,32 @@ fn main() {
     let app = Application::new();
     app.run();
 }
+
+#[cfg(test)]
+mod test {
+    use ctor;
+    use std::{env, process::Command};
+
+    // Run once before tests are executed.
+    #[ctor]
+    fn setup_schema() {
+        let schema_dir = &env::var("GSETTINGS_SCHEMA_DIR")
+            .unwrap_or(concat!(env!("CARGO_MANIFEST_DIR"), "/data").into());
+
+        let output = Command::new("glib-compile-schemas")
+            .arg(schema_dir)
+            .output()
+            .unwrap();
+
+        if !output.status.success() {
+            panic!(
+                "Failed to compile GSchema for tests; stdout: {}; stderr: {}",
+                String::from_utf8_lossy(&output.stdout),
+                String::from_utf8_lossy(&output.stderr)
+            );
+        }
+
+        env::set_var("GSETTINGS_SCHEMA_DIR", schema_dir);
+        env::set_var("GSETTINGS_BACKEND", "memory");
+    }
+}
diff --git a/src/meson.build b/src/meson.build
index 283706b..7237362 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -64,10 +64,12 @@ test(
     '--target-dir=@0@'.format(cargo_target_dir),
     '--',
     '--nocapture',
+    '--test-threads=1',
   ],
   env: [
     'RUST_BACKTRACE=1',
     'CARGO_HOME=@0@'.format(cargo_home),
+    'GSETTINGS_SCHEMA_DIR=@0@/data'.format(meson.project_build_root()),
     'PATH=/app/bin:/usr/bin:/usr/lib/sdk/llvm14/bin:/usr/lib/sdk/rust-stable/bin',  # TODO Remove llvm14 once removed in manifest
   ],
   timeout: 300, # give cargo more time
diff --git a/src/settings.rs b/src/settings.rs
index 0563793..2146fab 100644
--- a/src/settings.rs
+++ b/src/settings.rs
@@ -207,36 +207,8 @@ fn is_accessible(path: &Path) -> bool {
 mod tests {
     use super::*;
 
-    use std::{env, process::Command, sync::Once};
-
-    fn setup_schema() {
-        static INIT: Once = Once::new();
-
-        INIT.call_once(|| {
-            let schema_dir = concat!(env!("CARGO_MANIFEST_DIR"), "/data");
-
-            let output = Command::new("glib-compile-schemas")
-                .arg(schema_dir)
-                .output()
-                .unwrap();
-
-            if !output.status.success() {
-                panic!(
-                    "Failed to compile GSchema for tests; stdout: {}; stderr: {}",
-                    String::from_utf8_lossy(&output.stdout),
-                    String::from_utf8_lossy(&output.stderr)
-                );
-            }
-
-            env::set_var("GSETTINGS_SCHEMA_DIR", schema_dir);
-            env::set_var("GSETTINGS_BACKEND", "memory");
-        });
-    }
-
     #[test]
     fn default_profile() {
-        setup_schema();
-
         assert!(Settings::default().profile().is_some());
         assert!(Settings::default().profile().unwrap().supports_audio());
     }