diff --git a/crates/ely_app/src/services/mod.rs b/crates/ely_app/src/services/mod.rs
index 289ef82..f22de69 100644
--- a/crates/ely_app/src/services/mod.rs
+++ b/crates/ely_app/src/services/mod.rs
@@ -5,4 +5,4 @@ pub mod plugin_packages;
 pub mod plugin_signatures;
 
 #[cfg(test)]
-mod plugin_package_fixtures;
+mod plugin_package_test_support;
diff --git a/crates/ely_app/src/services/plugin_package_store.rs b/crates/ely_app/src/services/plugin_package_store.rs
index f71930d..3ed5143 100644
--- a/crates/ely_app/src/services/plugin_package_store.rs
+++ b/crates/ely_app/src/services/plugin_package_store.rs
@@ -262,7 +262,7 @@ mod tests {
     };
 
     use super::{PluginPackageStore, PluginPackageStoreError};
-    use crate::services::plugin_package_fixtures::write_signed_package;
+    use crate::services::plugin_package_test_support::write_signed_package;
     use crate::services::plugin_packages::PluginPackageReader;
 
     #[test]
diff --git a/crates/ely_app/src/services/plugin_package_fixtures.rs b/crates/ely_app/src/services/plugin_package_test_support.rs
similarity index 87%
rename from crates/ely_app/src/services/plugin_package_fixtures.rs
rename to crates/ely_app/src/services/plugin_package_test_support.rs
index d841a98..4f8be24 100644
--- a/crates/ely_app/src/services/plugin_package_fixtures.rs
+++ b/crates/ely_app/src/services/plugin_package_test_support.rs
@@ -11,7 +11,13 @@ use sha2::{Digest, Sha256};
 use super::plugin_signatures::signing_payload;
 
 const KEY_ID: &str = "elydora-alpha-plugins";
-const TEST_SIGNING_KEY: [u8; 32] = [9; 32];
+const DETERMINISTIC_SIGNING_KEY: [u8; 32] = [9; 32];
+const PARSABLE_SIGNATURE_VALUE: &str = concat!(
+    "00000000000000000000000000000000",
+    "00000000000000000000000000000000",
+    "00000000000000000000000000000000",
+    "00000000000000000000000000000000",
+);
 
 pub(crate) fn write_signed_package(
     root: &Path,
@@ -28,15 +34,14 @@ pub(crate) fn write_signed_package(
 pub(crate) fn sign_package_in_place(package: &Path, name: &str) -> Result<(), Box<dyn Error>> {
     fs::create_dir_all(package.join("signatures"))?;
 
-    let signing_key = SigningKey::from_bytes(&TEST_SIGNING_KEY);
+    let signing_key = SigningKey::from_bytes(&DETERMINISTIC_SIGNING_KEY);
     let public_key = hex_bytes(signing_key.verifying_key().to_bytes().as_slice());
     let component = fs::read(package.join("component.wasm"))?;
     let checksum = format!("{:x}", Sha256::digest(component.as_slice()));
-    let placeholder_signature = "0".repeat(128);
 
     fs::write(
         package.join("plugin.toml"),
-        manifest_toml(name, checksum.as_str(), public_key.as_str(), placeholder_signature.as_str()),
+        manifest_toml(name, checksum.as_str(), public_key.as_str(), PARSABLE_SIGNATURE_VALUE),
     )?;
 
     let manifest_text = fs::read_to_string(package.join("plugin.toml"))?;
diff --git a/crates/ely_app/src/services/plugin_packages.rs b/crates/ely_app/src/services/plugin_packages.rs
index 1c5fdb5..75accad 100644
--- a/crates/ely_app/src/services/plugin_packages.rs
+++ b/crates/ely_app/src/services/plugin_packages.rs
@@ -311,7 +311,9 @@ mod tests {
     };
 
     use super::PluginPackageReader;
-    use crate::services::plugin_package_fixtures::{sign_package_in_place, write_signed_package};
+    use crate::services::plugin_package_test_support::{
+        sign_package_in_place, write_signed_package,
+    };
     use crate::services::plugin_signatures::{
         PluginSignatureVerificationError, PluginSignatureVerifier, TrustedPluginSigningKeys,
     };