diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+### 3.9.2 [2022.10.05]
+* Require `text-show-3.10` or later in the test suite.
+
 ### 3.9.1 [2022.07.28]
 * Add a `TextShow` instance for `UUID` from `uuid-types`.
 
diff --git a/tests/Spec/Utils.hs b/tests/Spec/Utils.hs
--- a/tests/Spec/Utils.hs
+++ b/tests/Spec/Utils.hs
@@ -81,27 +81,27 @@
 -- | Expect a type's 'TextShow' instance to coincide with the output produced
 -- by the equivalent 'Generic' functions.
 genericTextShowSpec :: forall a. (Arbitrary a, Show a, TextShow a,
-                                  Generic a, GTextShowB Zero (Rep a))
+                                  Generic a, GTextShowB (Rep a ()))
                     => Proxy a -> Spec
 genericTextShowSpec _ = prop "generic TextShow" (prop_genericTextShow  :: Int -> a -> Expectation)
 
 -- | Verifies that a type's 'TextShow' instance coincides with the output produced
 -- by the equivalent 'Generic' functions.
-prop_genericTextShow :: (TextShow a, Generic a, GTextShowB Zero (Rep a))
+prop_genericTextShow :: (TextShow a, Generic a, GTextShowB (Rep a ()))
                      => Int -> a -> Expectation
 prop_genericTextShow p x = showbPrec p x `shouldBe` genericShowbPrec p x
 
 -- | Expect a type's 'TextShow1' instance to coincide with the output produced
 -- by the equivalent 'Generic1' functions.
 genericTextShow1Spec :: forall f a. (Arbitrary (f a), Show (f a), TextShow1 f,
-                                     Generic1 f, GTextShowB One (Rep1 f), TextShow a)
+                                     Generic1 f, GTextShowB1 (Rep1 f), TextShow a)
                      => Proxy (f a) -> Spec
 genericTextShow1Spec _ = prop "generic TextShow1" (prop_genericTextShow1 :: Int -> f a -> Expectation)
 
 -- | Verifies that a type's 'TextShow1' instance coincides with the output produced
 -- by the equivalent 'Generic1' functions.
 prop_genericTextShow1 :: ( TextShow1 f, Generic1 f
-                         , GTextShowB One (Rep1 f), TextShow a
+                         , GTextShowB1 (Rep1 f), TextShow a
                          )
                       => Int -> f a -> Expectation
 prop_genericTextShow1 p x =
diff --git a/text-show-instances.cabal b/text-show-instances.cabal
--- a/text-show-instances.cabal
+++ b/text-show-instances.cabal
@@ -1,5 +1,5 @@
 name:                text-show-instances
-version:             3.9.1
+version:             3.9.2
 synopsis:            Additional instances for text-show
 description:         @text-show-instances@ is a supplemental library to @text-show@
                      that provides additional @Show@ instances for data types in
@@ -284,7 +284,7 @@
                      , tagged                >= 0.4.4  && < 1
                      , scientific            >= 0.3.7  && < 0.4
                      , text-short            >= 0.1    && < 0.2
-                     , text-show             >= 3.4    && < 4
+                     , text-show             >= 3.10   && < 4
                      , text-show-instances
                      , th-orphans            >= 0.13.8 && < 1
                      , time                  >= 0.1    && < 1.13