diff --git a/tests/run-make/emit-path-unhashed/Makefile b/tests/run-make/emit-path-unhashed/Makefile
index 74047fe5f86..611f8578140 100644
--- a/tests/run-make/emit-path-unhashed/Makefile
+++ b/tests/run-make/emit-path-unhashed/Makefile
@@ -5,10 +5,10 @@ OUT=$(TMPDIR)/emit
 # --emit KIND=PATH should not affect crate hash vs --emit KIND
 all: $(OUT)/a/libfoo.rlib $(OUT)/b/libfoo.rlib $(OUT)/c/libfoo.rlib \
 		$(TMPDIR)/libfoo.rlib
-	$(RUSTC) -Zls $(TMPDIR)/libfoo.rlib > $(TMPDIR)/base.txt
-	$(RUSTC) -Zls $(OUT)/a/libfoo.rlib > $(TMPDIR)/a.txt
-	$(RUSTC) -Zls $(OUT)/b/libfoo.rlib > $(TMPDIR)/b.txt
-	$(RUSTC) -Zls $(OUT)/c/libfoo.rlib > $(TMPDIR)/c.txt
+	$(RUSTC) -Zls=root $(TMPDIR)/libfoo.rlib > $(TMPDIR)/base.txt
+	$(RUSTC) -Zls=root $(OUT)/a/libfoo.rlib > $(TMPDIR)/a.txt
+	$(RUSTC) -Zls=root $(OUT)/b/libfoo.rlib > $(TMPDIR)/b.txt
+	$(RUSTC) -Zls=root $(OUT)/c/libfoo.rlib > $(TMPDIR)/c.txt
 
 	diff $(TMPDIR)/base.txt $(TMPDIR)/a.txt
 	diff $(TMPDIR)/base.txt $(TMPDIR)/b.txt
diff --git a/tests/run-make/ls-metadata/Makefile b/tests/run-make/ls-metadata/Makefile
index 123dd64e15c..f03569baef7 100644
--- a/tests/run-make/ls-metadata/Makefile
+++ b/tests/run-make/ls-metadata/Makefile
@@ -3,6 +3,6 @@ include ../tools.mk
 
 all:
 	$(RUSTC) foo.rs
-	$(RUSTC) -Z ls $(TMPDIR)/foo
+	$(RUSTC) -Z ls=root $(TMPDIR)/foo
 	touch $(TMPDIR)/bar
-	$(RUSTC) -Z ls $(TMPDIR)/bar
+	$(RUSTC) -Z ls=root $(TMPDIR)/bar
diff --git a/tests/run-make/output-filename-overwrites-input/Makefile b/tests/run-make/output-filename-overwrites-input/Makefile
index 605b86b253e..fe5d231382d 100644
--- a/tests/run-make/output-filename-overwrites-input/Makefile
+++ b/tests/run-make/output-filename-overwrites-input/Makefile
@@ -8,7 +8,7 @@ all:
 	cp bar.rs $(TMPDIR)/bar.rlib
 	$(RUSTC) $(TMPDIR)/bar.rlib -o $(TMPDIR)/bar.rlib 2>&1 \
 		| $(CGREP) -e "the input file \".*bar.rlib\" would be overwritten by the generated executable"
-	$(RUSTC) foo.rs 2>&1 && $(RUSTC) -Z ls $(TMPDIR)/foo 2>&1
+	$(RUSTC) foo.rs 2>&1 && $(RUSTC) -Z ls=root $(TMPDIR)/foo 2>&1
 	cp foo.rs $(TMPDIR)/foo.rs
 	$(RUSTC) $(TMPDIR)/foo.rs -o $(TMPDIR)/foo.rs 2>&1 \
 		| $(CGREP) -e "the input file \".*foo.rs\" would be overwritten by the generated executable"