diff --git a/t/t1305-config-include.sh b/t/t1305-config-include.sh
index f1e1b289f9..f08cfcdfae 100755
--- a/t/t1305-config-include.sh
+++ b/t/t1305-config-include.sh
@@ -352,9 +352,7 @@ test_expect_success 'include cycles are detected' '
 	git init --bare cycle &&
 	git -C cycle config include.path cycle &&
 	git config -f cycle/cycle include.path config &&
-	test_must_fail \
-		env GIT_TEST_GETTEXT_POISON=false \
-		git -C cycle config --get-all test.value 2>stderr &&
+	test_must_fail git -C cycle config --get-all test.value 2>stderr &&
 	grep "exceeded maximum include depth" stderr
 '
 
diff --git a/t/t5411/common-functions.sh b/t/t5411/common-functions.sh
index 344d13f61a..13107fcdb6 100644
--- a/t/t5411/common-functions.sh
+++ b/t/t5411/common-functions.sh
@@ -36,9 +36,8 @@ create_commits_in () {
 # without having to worry about future changes of the commit ID and spaces
 # of the output.  Single quotes are replaced with double quotes, because
 # it is boring to prepare unquoted single quotes in expect text.  We also
-# remove some locale error messages, which break test if we turn on
-# `GIT_TEST_GETTEXT_POISON=true` in order to test unintentional translations
-# on plumbing commands.
+# remove some locale error messages. The emitted human-readable errors are
+# redundant to the more machine-readable output the tests already assert.
 make_user_friendly_and_stable_output () {
 	sed \
 		-e "s/  *\$//" \
diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index b36a93056f..d10076efd7 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -245,7 +245,7 @@ test_expect_success 'checkout to detach HEAD' '
 	rev=$(git rev-parse --short renamer^) &&
 	git checkout -f renamer &&
 	git clean -f &&
-	GIT_TEST_GETTEXT_POISON=false git checkout renamer^ 2>messages &&
+	git checkout renamer^ 2>messages &&
 	grep "HEAD is now at $rev" messages &&
 	test_line_count -gt 1 messages &&
 	H=$(git rev-parse --verify HEAD) &&
diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index a1c4f1f6d4..e5adee27d4 100755
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -2363,7 +2363,6 @@ test_expect_success 'sourcing the completion script clears cached commands' '
 '
 
 test_expect_success 'sourcing the completion script clears cached merge strategies' '
-	GIT_TEST_GETTEXT_POISON=false &&
 	__git_compute_merge_strategies &&
 	verbose test -n "$__git_merge_strategies" &&
 	. "$GIT_BUILD_DIR/contrib/completion/git-completion.bash" &&