diff --git a/C/ChainRulesTestUtils/Compat.toml b/C/ChainRulesTestUtils/Compat.toml
index ce5308b44ab2a6d..9c5551a935d826a 100644
--- a/C/ChainRulesTestUtils/Compat.toml
+++ b/C/ChainRulesTestUtils/Compat.toml
@@ -16,7 +16,7 @@ ChainRulesCore = "0.7.1-0.7"
 ["0.2.1-0.3.0"]
 FiniteDifferences = "0.9"
 
-["0.2.1-1"]
+["0.2.1-1.7"]
 Compat = "3"
 
 ["0.3"]
@@ -66,3 +66,6 @@ ChainRulesCore = "1.2.0-1"
 
 ["1.3.1-1"]
 ChainRulesCore = "1.11.2-1"
+
+["1.8-1"]
+Compat = "3-4"
diff --git a/C/ChainRulesTestUtils/Versions.toml b/C/ChainRulesTestUtils/Versions.toml
index 10460a375de9365..0ed7fbd5b6a743c 100644
--- a/C/ChainRulesTestUtils/Versions.toml
+++ b/C/ChainRulesTestUtils/Versions.toml
@@ -219,3 +219,6 @@ git-tree-sha1 = "3eaf21c324e9f324811c207772047c669a97d0ef"
 
 ["1.7.1"]
 git-tree-sha1 = "12d2bf21697b3c36cc9180e7e09b072f93ed6c57"
+
+["1.8.0"]
+git-tree-sha1 = "090c09f509bbfa732c2106a9fa36605ea98dfe50"