diff --git a/tests/custom-coder/programs/dex/Cargo.toml b/tests/custom-coder/programs/dex/Cargo.toml
new file mode 100644
index 00000000..2861ce32
--- /dev/null
+++ b/tests/custom-coder/programs/dex/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "dex"
+version = "0.1.0"
+description = "Created with Anchor"
+edition = "2018"
+
+[lib]
+crate-type = ["cdylib", "lib"]
+name = "dex"
+
+[features]
+no-entrypoint = []
+no-idl = []
+no-log-ix-name = []
+cpi = ["no-entrypoint"]
+default = []
+
+[dependencies]
+anchor-lang = "0.20.1"
diff --git a/tests/custom-coder/programs/dex/Xargo.toml b/tests/custom-coder/programs/dex/Xargo.toml
new file mode 100644
index 00000000..475fb71e
--- /dev/null
+++ b/tests/custom-coder/programs/dex/Xargo.toml
@@ -0,0 +1,2 @@
+[target.bpfel-unknown-unknown.dependencies.std]
+features = []
diff --git a/tests/custom-coder/programs/dex/src/lib.rs b/tests/custom-coder/programs/dex/src/lib.rs
new file mode 100644
index 00000000..95eb7cf0
--- /dev/null
+++ b/tests/custom-coder/programs/dex/src/lib.rs
@@ -0,0 +1,17 @@
+use anchor_lang::prelude::*;
+
+declare_id!("Fg6PaFpoGXkYsidMpWTK6W2BeZ7FEfcYkg476zPFsLnS");
+
+// TODO: add a dumy instruction and accounts context to generate the
+//       the idl for the dex program.
+
+#[program]
+pub mod dex {
+    use super::*;
+    pub fn initialize(ctx: Context<Initialize>) -> ProgramResult {
+        Ok(())
+    }
+}
+
+#[derive(Accounts)]
+pub struct Initialize {}