diff --git a/lib/make/𓃬𓍄𓋹𓀭/mb_flow_assert.mk b/lib/make/𓃬𓍄𓋹𓀭/mb_flow_assert.mk
index d40d334..cfe7e95 100644
--- a/lib/make/𓃬𓍄𓋹𓀭/mb_flow_assert.mk
+++ b/lib/make/𓃬𓍄𓋹𓀭/mb_flow_assert.mk
@@ -5,7 +5,7 @@ define __mb-flow-assert-grep-binary-x
 $(1)/@$(5)-deps:: $(1)/@assert/$(5)/$(2)
 
 $(1)/@assert/$(5)/$(2): $(1)/@build
-$(MB_@RECIPE)grep -q -U $(4) $(1)/$(3)
+$(MB_@RECIPE)grep --colour$(MB_MAKE_EQUALS)auto -U "$(4)" $(1)/$(3)
 $(MB_@RECIPE)$$(call mb-make-call,mb-os-echo-assert,$$(MB_I18N_ASSERT_SUCCESS) $(1)/@assert/$(2)/$(5))
 $(MB_@RECIPE)$$(call mb-make-call,mb-proj-grow-assert-success,$(5))
 $(MB_ᕽᕽᕽ　　　)$$(call mb-make-call,mb-doc-target-assert,$(1)/@assert/$(5)/$(2),Asserts that $(3) output matches.)
@@ -35,7 +35,7 @@ $(7)/@@init-deps:: $(1)/@build
 $(1)/@assert/$(5)/$(2): $(7)/@build
 $(MB_@RECIPE)$$(if $$(wildcard $(7)/$(3).out),,$$(call mb-make-call,mb-os-file-delete,$(7)/$(3).out))
 $(MB_@RECIPE)$$(call mb-make-call,mb-msxpipe-safe-assert,$(7),$(3) > $(3).out,$(6))
-$(MB_@RECIPE)grep -q $(4) $(7)/$(3).out
+$(MB_@RECIPE)grep --colour$(MB_MAKE_EQUALS)auto "$(4)" $(7)/$(3).out
 $(MB_@RECIPE)$$(call mb-make-call,mb-os-echo-assert,$$(MB_I18N_ASSERT_SUCCESS) $(1)/@assert/$(2)/$(5))
 $(MB_@RECIPE)$$(call mb-make-call,mb-proj-grow-assert-success,$(5))
 $(MB_ᕽᕽᕽ　　　)$$(call mb-make-call,mb-doc-target-assert,$(1)/@assert/$(5)/$(2),Asserts that $(3) output matches.)
diff --git a/src/example/dist-hello-qa-dos2/0module010.mk b/src/example/dist-hello-qa-dos2/0module010.mk
index 7861070..6d9f0f7 100644
--- a/src/example/dist-hello-qa-dos2/0module010.mk
+++ b/src/example/dist-hello-qa-dos2/0module010.mk
@@ -16,10 +16,10 @@ _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-autoexec-append-safe-assert,$(EXAMP
 _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-autoexec-append-safe-assert,$(EXAMPLE_DIST_HELLO_QA_DOS2_BIN),hello4 > hello4.out)
 _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-autoexec-append-exit,$(EXAMPLE_DIST_HELLO_QA_DOS2_BIN))
 _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-openmsx-dosctl,$(EXAMPLE_DIST_HELLO_QA_DOS2_BIN))
-_$(MB_ᕽᕽᕽ　　)grep -q "M80: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_DOS2_BIN)/hello1.out
-_$(MB_ᕽᕽᕽ　　)grep -q "SDCC: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_DOS2_BIN)/hello2.out
-_$(MB_ᕽᕽᕽ　　)grep -q "MAKE: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_DOS2_BIN)/hello3.out
-_$(MB_ᕽᕽᕽ　　)grep -q "N80: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_DOS2_BIN)/hello4.out
+_$(MB_ᕽᕽᕽ　　)grep --colour$(MB_MAKE_EQUALS)auto "M80: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_DOS2_BIN)/hello1.out
+_$(MB_ᕽᕽᕽ　　)grep --colour$(MB_MAKE_EQUALS)auto "SDCC: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_DOS2_BIN)/hello2.out
+_$(MB_ᕽᕽᕽ　　)grep --colour$(MB_MAKE_EQUALS)auto "MAKE: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_DOS2_BIN)/hello3.out
+_$(MB_ᕽᕽᕽ　　)grep --colour$(MB_MAKE_EQUALS)auto "N80: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_DOS2_BIN)/hello4.out
 _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-os-echo-assert,$(MB_I18N_ASSERT_SUCCESS) $(EXAMPLE_DIST_HELLO_QA_DOS2_BIN)/@assert)
 _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-proj-grow-assert-success,@package-qa)
 _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-proj-grow-assert-success,@package-qa)
diff --git a/src/example/dist-hello-qa-msx1/0module010.mk b/src/example/dist-hello-qa-msx1/0module010.mk
index e341160..1a14413 100644
--- a/src/example/dist-hello-qa-msx1/0module010.mk
+++ b/src/example/dist-hello-qa-msx1/0module010.mk
@@ -19,10 +19,10 @@ _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-autoexec-append-safe-assert,$(EXAMP
 _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-autoexec-append-safe-assert,$(EXAMPLE_DIST_HELLO_QA_MSX1_BIN),hello4 > hello4.out)
 _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-autoexec-append-exit,$(EXAMPLE_DIST_HELLO_QA_MSX1_BIN))
 _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-openmsx-dosctl,$(EXAMPLE_DIST_HELLO_QA_MSX1_BIN),$(EXAMPLE_DIST_HELLO_QA_MSX1_MACHINE))
-_$(MB_ᕽᕽᕽ　　)grep -q "M80: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_MSX1_BIN)/hello1.out
-_$(MB_ᕽᕽᕽ　　)grep -q "SDCC: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_MSX1_BIN)/hello2.out
-_$(MB_ᕽᕽᕽ　　)grep -q "MAKE: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_MSX1_BIN)/hello3.out
-_$(MB_ᕽᕽᕽ　　)grep -q "N80: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_MSX1_BIN)/hello4.out
+_$(MB_ᕽᕽᕽ　　)grep --colour$(MB_MAKE_EQUALS)auto "M80: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_MSX1_BIN)/hello1.out
+_$(MB_ᕽᕽᕽ　　)grep --colour$(MB_MAKE_EQUALS)auto "SDCC: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_MSX1_BIN)/hello2.out
+_$(MB_ᕽᕽᕽ　　)grep --colour$(MB_MAKE_EQUALS)auto "MAKE: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_MSX1_BIN)/hello3.out
+_$(MB_ᕽᕽᕽ　　)grep --colour$(MB_MAKE_EQUALS)auto "N80: Hello MSX" $(EXAMPLE_DIST_HELLO_QA_MSX1_BIN)/hello4.out
 _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-os-echo-assert,$(MB_I18N_ASSERT_SUCCESS) $(EXAMPLE_DIST_HELLO_QA_MSX1_BIN)/@assert)
 _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-proj-grow-assert-success,@package-qa)
 _$(MB_ᕽᕽᕽ　　)$(call mb-make-call,mb-proj-grow-assert-success,@package-qa)
diff --git a/src/example/hello-macro80/0module000.mk b/src/example/hello-macro80/0module000.mk
index 772500f..3a5372d 100644
--- a/src/example/hello-macro80/0module000.mk
+++ b/src/example/hello-macro80/0module000.mk
@@ -5,5 +5,5 @@ EXAMPLE_HELLO_MACRO80_DEPS := $(EXAMPLE_HELLO_MACRO80_BIN)/hello.com
 
 $(call mb-make-call,mb-flow-macro80-bdos-mono,$(EXAMPLE_HELLO_MACRO80_BIN),$(EXAMPLE_HELLO_MACRO80_SRC),hello)
 $(call mb-make-call,mb-flow-assert-msxpipe-grep-test,$(EXAMPLE_HELLO_MACRO80_BIN),$(EXAMPLE_HELLO_MACRO80_DEPS),check-m80,hello,M80)
-$(call mb-make-call,mb-flow-assert-msxpipe-grep-test,$(EXAMPLE_HELLO_MACRO80_BIN),$(EXAMPLE_HELLO_MACRO80_DEPS),check-txt,hello,"o MSX world...")
+$(call mb-make-call,mb-flow-assert-msxpipe-grep-test,$(EXAMPLE_HELLO_MACRO80_BIN),$(EXAMPLE_HELLO_MACRO80_DEPS),check-txt,hello,o MSX world...)
 
diff --git a/src/example/hello-nestor80/0module000.mk b/src/example/hello-nestor80/0module000.mk
index 4a37a75..3f6792a 100644
--- a/src/example/hello-nestor80/0module000.mk
+++ b/src/example/hello-nestor80/0module000.mk
@@ -5,5 +5,5 @@ EXAMPLE_HELLO_NESTOR80_DEPS := $(EXAMPLE_HELLO_NESTOR80_BIN)/hello.com
 
 $(call mb-make-call,mb-flow-nestor80-bdos-mono,$(EXAMPLE_HELLO_NESTOR80_BIN),$(EXAMPLE_HELLO_NESTOR80_SRC),hello)
 $(call mb-make-call,mb-flow-assert-msxpipe-grep-test,$(EXAMPLE_HELLO_NESTOR80_BIN),$(EXAMPLE_HELLO_NESTOR80_DEPS),check-m80,hello,N80)
-$(call mb-make-call,mb-flow-assert-msxpipe-grep-test,$(EXAMPLE_HELLO_NESTOR80_BIN),$(EXAMPLE_HELLO_NESTOR80_DEPS),check-txt,hello,"o MSX world...")
+$(call mb-make-call,mb-flow-assert-msxpipe-grep-test,$(EXAMPLE_HELLO_NESTOR80_BIN),$(EXAMPLE_HELLO_NESTOR80_DEPS),check-txt,hello,o MSX world...)