diff --git a/.travis.yml b/.travis.yml
index ad4eb8c6..3e2439d3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,9 +21,9 @@ script:
   - test/powerlevel9k.spec
   - test/functions/utilities.spec
   - test/functions/colors.spec
+  - test/functions/icons.spec
   - test/segments/command_execution_time.spec
   - test/segments/dir.spec
   - test/segments/rust_version.spec
   - test/segments/go_version.spec
   - test/segments/vcs.spec
-
diff --git a/test/functions/icons.spec b/test/functions/icons.spec
new file mode 100755
index 00000000..0a6d5942
--- /dev/null
+++ b/test/functions/icons.spec
@@ -0,0 +1,74 @@
+#!/usr/bin/env zsh
+#vim:ft=zsh ts=2 sw=2 sts=2 et fenc=utf-8
+
+# Required for shunit2 to run correctly
+setopt shwordsplit
+SHUNIT_PARENT=$0
+
+function setUp() {
+    # Store old value for LC_CTYPE
+    _OLD_LC_CTYPE="${LC_CTYPE}"
+    # Reset actual LC_CTYPE
+    unset LC_CTYPE
+
+    # Store old P9K mode
+    _OLD_P9K_MODE="${POWERLEVEL9K_MODE}"
+}
+
+function tearDown() {
+    # Restore LC_CTYPE
+    LC_CTYPE="${_OLD_LC_CTYPE}"
+
+    # Restore old P9K mode
+    POWERLEVEL9K_MODE="${_OLD_P9K_MODE}"
+}
+
+function testLcCtypeIsSetCorrectlyInDefaultMode() {
+  POWERLEVEL9K_MODE="default"
+  # Load Powerlevel9k
+  source functions/icons.zsh
+
+  assertEquals 'en_US.UTF-8' "${LC_CTYPE}"
+}
+
+function testLcCtypeIsSetCorrectlyInAwesomePatchedMode() {
+  POWERLEVEL9K_MODE="awesome-patched"
+  # Load Powerlevel9k
+  source functions/icons.zsh
+
+  assertEquals 'en_US.UTF-8' "${LC_CTYPE}"
+}
+
+function testLcCtypeIsSetCorrectlyInAwesomeFontconfigMode() {
+  POWERLEVEL9K_MODE="awesome-fontconfig"
+  # Load Powerlevel9k
+  source functions/icons.zsh
+
+  assertEquals 'en_US.UTF-8' "${LC_CTYPE}"
+}
+
+function testLcCtypeIsSetCorrectlyInNerdfontFontconfigMode() {
+  POWERLEVEL9K_MODE="nerdfont-fontconfig"
+  # Load Powerlevel9k
+  source functions/icons.zsh
+
+  assertEquals 'en_US.UTF-8' "${LC_CTYPE}"
+}
+
+function testLcCtypeIsSetCorrectlyInFlatMode() {
+  POWERLEVEL9K_MODE="flat"
+  # Load Powerlevel9k
+  source functions/icons.zsh
+
+  assertEquals 'en_US.UTF-8' "${LC_CTYPE}"
+}
+
+function testLcCtypeIsSetCorrectlyInCompatibleMode() {
+  POWERLEVEL9K_MODE="compatible"
+  # Load Powerlevel9k
+  source functions/icons.zsh
+
+  assertEquals 'en_US.UTF-8' "${LC_CTYPE}"
+}
+
+source shunit2/source/2.1/src/shunit2
\ No newline at end of file