diff --git a/sources/test/test_curl_source.py b/sources/test/test_curl_source.py
index 1dae9e0f..6fd728f7 100644
--- a/sources/test/test_curl_source.py
+++ b/sources/test/test_curl_source.py
@@ -16,7 +16,7 @@ def test_curl_source_not_exists(sources_service):
     desc = {
         "url": "http://localhost:80/a",
     }
-    checksum = "sha256:1234567890123456789012345678901234567890909b14ffb032aa20fa23d9ad6"
+    checksum = "sha256:1111111111111111111111111111111111111111111111111111111111111111"
     assert not sources_service.exists(checksum, desc)
 
 
@@ -26,14 +26,12 @@ def test_curl_source_exists(sources_service):
     desc = {
         "url": "http://localhost:80/a",
     }
-    checksum = "sha256:1234567890123456789012345678901234567890909b14ffb032aa20fa23d9ad6"
+    checksum = "sha256:1111111111111111111111111111111111111111111111111111111111111111"
     pathlib.Path(os.path.join(tmpdir.name, checksum)).touch()
     assert sources_service.exists(checksum, desc)
 
 
 def test_curl_source_amend_secrets(sources_service):
-    tmpdir = tempfile.TemporaryDirectory()
-    sources_service.cache = tmpdir.name
     desc = {
         "url": "http://localhost:80/a",
         "secrets": {
@@ -49,25 +47,21 @@ def test_curl_source_amend_secrets(sources_service):
             del os.environ["OSBUILD_SOURCES_CURL_SSL_CLIENT_KEY"]
             del os.environ["OSBUILD_SOURCES_CURL_SSL_CLIENT_CERT"]
         cm.callback(cb)
-        checksum = "sha256:1234567890123456789012345678901234567890909b14ffb032aa20fa23d9ad6"
-        pathlib.Path(os.path.join(tmpdir.name, checksum)).touch()
-        new_desc = sources_service.amend_secrets(checksum, desc)
-        assert new_desc[1]["secrets"]["ssl_client_key"] == "key"
-        assert new_desc[1]["secrets"]["ssl_client_cert"] == "cert"
-        assert new_desc[1]["secrets"]["ssl_ca_cert"] is None
+        checksum = "sha256:1111111111111111111111111111111111111111111111111111111111111111"
+        _, new_desc = sources_service.amend_secrets(checksum, desc)
+        assert new_desc["secrets"]["ssl_client_key"] == "key"
+        assert new_desc["secrets"]["ssl_client_cert"] == "cert"
+        assert new_desc["secrets"]["ssl_ca_cert"] is None
 
 
 def test_curl_source_amend_secrets_fail(sources_service):
-    tmpdir = tempfile.TemporaryDirectory()
-    sources_service.cache = tmpdir.name
     desc = {
         "url": "http://localhost:80/a",
         "secrets": {
             "name": "org.osbuild.mtls",
         },
     }
-    checksum = "sha256:1234567890123456789012345678901234567890909b14ffb032aa20fa23d9ad6"
-    pathlib.Path(os.path.join(tmpdir.name, checksum)).touch()
+    checksum = "sha256:1111111111111111111111111111111111111111111111111111111111111111"
     with pytest.raises(RuntimeError) as exc:
         sources_service.amend_secrets(checksum, desc)
     assert "mtls secrets required" in str(exc)