diff --git a/Cargo.lock b/Cargo.lock
index c3a1b93..b9ec58f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -423,6 +423,30 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "proc-macro-error"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
+dependencies = [
+ "proc-macro-error-attr",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro-error-attr"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "version_check",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.36"
@@ -580,15 +604,15 @@ dependencies = [
 
 [[package]]
 name = "test-case"
-version = "1.2.1"
+version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7cad0a06f9a61e94355aa3b3dc92d85ab9c83406722b1ca5e918d4297c12c23"
+checksum = "4f7d58e237f65d5fe5eaf1105188c94c9a441e1fbc298ed5df45ec9c9af236d3"
 dependencies = [
  "cfg-if",
+ "proc-macro-error",
  "proc-macro2",
  "quote",
  "syn",
- "version_check",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 81526e7..6ae27a3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -72,7 +72,7 @@ jemallocator = {version = "0.3.0", optional = true}
 diff = "0.1"
 tempdir = "0.3"
 filetime = "0.2"
-test-case = "1.2"
+test-case = "2.0"
 
 [profile.release]
 lto = true