diff --git a/test/hush/Makefile b/test/hush/Makefile
index dfa2a92..a3c9ae5 100644
--- a/test/hush/Makefile
+++ b/test/hush/Makefile
@@ -4,3 +4,4 @@
 # Francis Laniel, Amarula Solutions, francis.laniel@amarulasolutions.com
 
 obj-y += cmd_ut_hush.o
+obj-y += if.o
diff --git a/test/hush/if.c b/test/hush/if.c
new file mode 100644
index 0000000..b7200e3
--- /dev/null
+++ b/test/hush/if.c
@@ -0,0 +1,316 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) Copyright 2021
+ * Francis Laniel, Amarula Solutions, francis.laniel@amarulasolutions.com
+ */
+
+#include <common.h>
+#include <command.h>
+#include <env_attr.h>
+#include <test/hush.h>
+#include <test/ut.h>
+
+/*
+ * All tests will execute the following:
+ * if condition_to_test; then
+ *   true
+ * else
+ *   false
+ * fi
+ * If condition is true, command returns 1, 0 otherwise.
+ */
+const char *if_format = "if %s; then true; else false; fi";
+
+static int hush_test_if_base(struct unit_test_state *uts)
+{
+	char if_formatted[128];
+
+	sprintf(if_formatted, if_format, "true");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "false");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	return 0;
+}
+HUSH_TEST(hush_test_if_base, 0);
+
+static int hush_test_if_basic_operators(struct unit_test_state *uts)
+{
+	char if_formatted[128];
+
+	sprintf(if_formatted, if_format, "test aaa = aaa");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test aaa = bbb");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test aaa != bbb");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test aaa != aaa");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test aaa < bbb");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test bbb < aaa");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test bbb > aaa");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test aaa > bbb");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 123 -eq 123");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 123 -eq 456");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 123 -ne 456");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 123 -ne 123");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 123 -lt 456");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 123 -lt 123");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 456 -lt 123");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 123 -le 456");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 123 -le 123");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 456 -le 123");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 456 -gt 123");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 123 -gt 123");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 123 -gt 456");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 456 -ge 123");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 123 -ge 123");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 123 -ge 456");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	return 0;
+}
+HUSH_TEST(hush_test_if_basic_operators, 0);
+
+static int hush_test_if_octal(struct unit_test_state *uts)
+{
+	char if_formatted[128];
+
+	sprintf(if_formatted, if_format, "test 010 -eq 010");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 010 -eq 011");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 010 -ne 011");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 010 -ne 010");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	return 0;
+}
+HUSH_TEST(hush_test_if_octal, 0);
+
+static int hush_test_if_hexadecimal(struct unit_test_state *uts)
+{
+	char if_formatted[128];
+
+	sprintf(if_formatted, if_format, "test 0x2000000 -gt 0x2000001");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 0x2000000 -gt 0x2000000");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 0x2000000 -gt 0x1ffffff");
+	ut_assertok(run_command(if_formatted, 0));
+
+	return 0;
+}
+HUSH_TEST(hush_test_if_hexadecimal, 0);
+
+static int hush_test_if_mixed(struct unit_test_state *uts)
+{
+	char if_formatted[128];
+
+	sprintf(if_formatted, if_format, "test 010 -eq 10");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 010 -ne 10");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 0xa -eq 10");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 0xa -eq 012");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 2000000 -gt 0x1ffffff");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 0x2000000 -gt 1ffffff");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 0x2000000 -lt 1ffffff");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 0x2000000 -eq 2000000");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test 0x2000000 -ne 2000000");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test -z \"\"");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test -z \"aaa\"");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test -n \"aaa\"");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test -n \"\"");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	return 0;
+}
+HUSH_TEST(hush_test_if_mixed, 0);
+
+static int hush_test_if_inverted(struct unit_test_state *uts)
+{
+	char if_formatted[128];
+
+	sprintf(if_formatted, if_format, "test ! aaa = aaa");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test ! aaa = bbb");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test ! ! aaa = aaa");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test ! ! aaa = bbb");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	return 0;
+}
+HUSH_TEST(hush_test_if_inverted, 0);
+
+static int hush_test_if_binary(struct unit_test_state *uts)
+{
+	char if_formatted[128];
+
+	sprintf(if_formatted, if_format, "test aaa != aaa -o bbb != bbb");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test aaa != aaa -o bbb = bbb");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test aaa = aaa -o bbb != bbb");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test aaa = aaa -o bbb = bbb");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test aaa != aaa -a bbb != bbb");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test aaa != aaa -a bbb = bbb");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test aaa = aaa -a bbb != bbb");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test aaa = aaa -a bbb = bbb");
+	ut_assertok(run_command(if_formatted, 0));
+
+	return 0;
+}
+HUSH_TEST(hush_test_if_binary, 0);
+
+static int hush_test_if_inverted_binary(struct unit_test_state *uts)
+{
+	char if_formatted[128];
+
+	sprintf(if_formatted, if_format, "test ! aaa != aaa -o ! bbb != bbb");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test ! aaa != aaa -o ! bbb = bbb");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test ! aaa = aaa -o ! bbb != bbb");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test ! aaa = aaa -o ! bbb = bbb");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format,
+		"test ! ! aaa != aaa -o ! ! bbb != bbb");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format,
+		"test ! ! aaa != aaa -o ! ! bbb = bbb");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format,
+		"test ! ! aaa = aaa -o ! ! bbb != bbb");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test ! ! aaa = aaa -o ! ! bbb = bbb");
+	ut_assertok(run_command(if_formatted, 0));
+
+	return 0;
+}
+HUSH_TEST(hush_test_if_inverted_binary, 0);
+
+static int hush_test_if_z_operator(struct unit_test_state *uts)
+{
+	char if_formatted[128];
+
+	/* Deal with environment variable used during test. */
+	env_set("ut_var_nonexistent", NULL);
+	env_set("ut_var_exists", "1");
+	env_set("ut_var_unset", "1");
+
+	sprintf(if_formatted, if_format, "test -z \"$ut_var_nonexistent\"");
+	ut_assertok(run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test -z \"$ut_var_exists\"");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	sprintf(if_formatted, if_format, "test -z \"$ut_var_unset\"");
+	ut_asserteq(1, run_command(if_formatted, 0));
+
+	env_set("ut_var_unset", NULL);
+	sprintf(if_formatted, if_format, "test -z \"$ut_var_unset\"");
+	ut_assertok(run_command(if_formatted, 0));
+
+	/* Clear the set environment variable. */
+	env_set("ut_var_exists", NULL);
+
+	return 0;
+}
+HUSH_TEST(hush_test_if_z_operator, 0);