diff --git a/highlighters/main/test-data/assign-append.zsh b/highlighters/main/test-data/assign-append.zsh
index 29e759a..973e74c 100644
--- a/highlighters/main/test-data/assign-append.zsh
+++ b/highlighters/main/test-data/assign-append.zsh
@@ -28,6 +28,7 @@
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------
 
+ZSH_HIGHLIGHT_STYLES[assign]=$unused_highlight
 BUFFER='a+=(lorem ipsum)'
 
 expected_region_highlight=(
diff --git a/highlighters/main/test-data/assign.zsh b/highlighters/main/test-data/assign.zsh
index 61edd6d..7351fa9 100644
--- a/highlighters/main/test-data/assign.zsh
+++ b/highlighters/main/test-data/assign.zsh
@@ -28,6 +28,7 @@
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------
 
+ZSH_HIGHLIGHT_STYLES[assign]=$unused_highlight
 BUFFER='A=1 b=("foo" bar)'
 
 expected_region_highlight=(
diff --git a/highlighters/main/test-data/dollar-quoted.zsh b/highlighters/main/test-data/dollar-quoted.zsh
index 7906d3e..31f8f5a 100644
--- a/highlighters/main/test-data/dollar-quoted.zsh
+++ b/highlighters/main/test-data/dollar-quoted.zsh
@@ -28,6 +28,7 @@
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------
 
+ZSH_HIGHLIGHT_STYLES[dollar-quoted-argument]=$unused_highlight
 BUFFER=": \$'*'"
 
 expected_region_highlight=(
diff --git a/highlighters/main/test-data/multiline-string2.zsh b/highlighters/main/test-data/multiline-string2.zsh
index 03626af..d460d6e 100644
--- a/highlighters/main/test-data/multiline-string2.zsh
+++ b/highlighters/main/test-data/multiline-string2.zsh
@@ -28,6 +28,7 @@
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------
 
+ZSH_HIGHLIGHT_STYLES[double-quoted-argument]=$unused_highlight
 BUFFER=$'echo "foo1\n'
 
 expected_region_highlight=(
diff --git a/highlighters/main/test-data/sudo-command.zsh b/highlighters/main/test-data/sudo-command.zsh
index ce19f0c..cf229c9 100644
--- a/highlighters/main/test-data/sudo-command.zsh
+++ b/highlighters/main/test-data/sudo-command.zsh
@@ -28,6 +28,7 @@
 # vim: ft=zsh sw=2 ts=2 et
 # -------------------------------------------------------------------------------------------------
 
+ZSH_HIGHLIGHT_STYLES[single-hyphen-option]=$unused_highlight
 BUFFER='sudo -u otheruser ls /'
 
 expected_region_highlight=(