diff --git a/tests/interactive.fish b/tests/interactive.fish
index 8f386f8b7..cdb449c13 100644
--- a/tests/interactive.fish
+++ b/tests/interactive.fish
@@ -10,6 +10,12 @@ set TESTS_TO_RETRY bind.expect
 # Change to directory containing this script
 cd (dirname (status -f))
 
+# These env vars should not be inherited from the user environment because they can affect the
+# behavior of the tests. So either remove them or set them to a known value.
+# See also tests/test.fish.
+set TERM xterm
+set -e ITERM_PROFILE
+
 # Test files specified on commandline, or all *.expect files
 if set -q argv[1]
     set files_to_test $argv.expect
diff --git a/tests/test.fish b/tests/test.fish
index 005968af3..f5741f29b 100644
--- a/tests/test.fish
+++ b/tests/test.fish
@@ -14,6 +14,12 @@ else
     set files_to_test *.in
 end
 
+# These env vars should not be inherited from the user environment because they can affect the
+# behavior of the tests. So either remove them or set them to a known value.
+# See also tests/interactive.fish.
+set TERM xterm
+set -e ITERM_PROFILE
+
 source test_util.fish (status -f) $argv; or exit
 
 say -o cyan "Testing high level script functionality"