diff --git a/.gitignore b/.gitignore
index e934cb5..745b27a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,5 @@
 deps/deps.jl
 docs/build/
 docs/site/
+Manifest.toml
+test/Manifest.toml
diff --git a/test/quantum.jl b/test/quantum.jl
index 87879b7..32db358 100644
--- a/test/quantum.jl
+++ b/test/quantum.jl
@@ -4,7 +4,7 @@ using JSON
     files = filter(s -> endswith(s, ".json"), readdir(joinpath("ref", modelname)))
     @testset "$filename" for filename in files
         diagres = JSON.parsefile(joinpath("ref", modelname, filename))
-        param = diagres["Parameter"]
+        param = Dict{String,Any}(diagres["Parameter"])
         ref = diagres["Result"]
         param["Model"] = QuantumXXZ
         param["Lattice"] = "chain lattice"