diff --git a/src/runtime/tests/mod.rs b/src/runtime/tests/mod.rs
new file mode 100644
index 0000000000000000000000000000000000000000..3fdcdf9cdedf9f36b072a9185f65eb55e01181cd
--- /dev/null
+++ b/src/runtime/tests/mod.rs
@@ -0,0 +1,60 @@
+mod network_shapes;
+mod api_component;
+mod speculation;
+mod data_transmission;
+mod sync_failure;
+
+use super::*;
+use crate::{PortId, ProtocolDescription};
+use crate::common::Id;
+use crate::protocol::eval::*;
+use crate::runtime::native::{ApplicationSyncAction};
+
+// Generic testing constants, use when appropriate to simplify stress-testing
+// pub(crate) const NUM_THREADS: u32 =  8;     // number of threads in runtime
+// pub(crate) const NUM_INSTANCES: u32 = 750;  // number of test instances constructed
+// pub(crate) const NUM_LOOPS: u32 = 10;       // number of loops within a single test (not used by all tests)
+
+pub(crate) const NUM_THREADS: u32 = 6;
+pub(crate) const NUM_INSTANCES: u32 = 2;
+pub(crate) const NUM_LOOPS: u32 = 1;
+
+
+fn create_runtime(pdl: &str) -> Runtime {
+    let protocol = ProtocolDescription::parse(pdl.as_bytes()).expect("parse pdl");
+    let runtime = Runtime::new(NUM_THREADS, protocol);
+
+    return runtime;
+}
+
+fn run_test_in_runtime<F: Fn(&mut ApplicationInterface)>(pdl: &str, constructor: F) {
+    let protocol = ProtocolDescription::parse(pdl.as_bytes())
+        .expect("parse PDL");
+    let runtime = Runtime::new(NUM_THREADS, protocol);
+
+    let mut api = runtime.create_interface();
+    for _ in 0..NUM_INSTANCES {
+        constructor(&mut api);
+    }
+}
+
+pub(crate) struct TestTimer {
+    name: &'static str,
+    started: std::time::Instant
+}
+
+impl TestTimer {
+    pub(crate) fn new(name: &'static str) -> Self {
+        Self{ name, started: std::time::Instant::now() }
+    }
+}
+
+impl Drop for TestTimer {
+    fn drop(&mut self) {
+        let delta = std::time::Instant::now() - self.started;
+        let nanos = (delta.as_secs_f64() * 1_000_000.0) as u64;
+        let millis = nanos / 1000;
+        let nanos = nanos % 1000;
+        println!("[{}] Took {:>4}.{:03} ms", self.name, millis, nanos);
+    }
+}