diff --git a/build/test/cache/test_Vsubstract.c b/build/test/cache/test_Vsubstract.c
new file mode 100644
index 0000000..6e1b9f7
--- /dev/null
+++ b/build/test/cache/test_Vsubstract.c
@@ -0,0 +1,39 @@
+#include "src/funktion.h"
+#include "/var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h"
+
+
+void setUp(void)
+
+{
+
+}
+
+
+
+void tearDown(void)
+
+{
+
+}
+
+
+
+void test_Vsubstract_NeedToImplement(void)
+
+{
+
+    double x1 = 234;
+
+    double z1 = 12;
+
+    double exp = Vsubstract(x1,z1);
+
+    double result = 222;
+
+    UnityAssertFloatsWithin((UNITY_FLOAT)((UNITY_FLOAT)((result)) * (UNITY_FLOAT)(0.00001f)), (UNITY_FLOAT)((UNITY_FLOAT)((result))), (UNITY_FLOAT)((UNITY_FLOAT)((exp))), ((
+
+   ((void *)0)
+
+   )), (UNITY_UINT)((UNITY_UINT)(18)));
+
+}
diff --git a/build/test/dependencies/test_Vsubstract.d b/build/test/dependencies/test_Vsubstract.d
new file mode 100644
index 0000000..a251090
--- /dev/null
+++ b/build/test/dependencies/test_Vsubstract.d
@@ -0,0 +1,4 @@
+build/test/out/c/test_Vsubstract.o: test/test_Vsubstract.c \
+ /var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h \
+ /var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity_internals.h \
+ src/funktion.h
diff --git a/build/test/dependencies/test_Vsubstract_runner.d b/build/test/dependencies/test_Vsubstract_runner.d
new file mode 100644
index 0000000..ac6ae0d
--- /dev/null
+++ b/build/test/dependencies/test_Vsubstract_runner.d
@@ -0,0 +1,4 @@
+build/test/out/c/test_Vsubstract_runner.o: \
+ build/test/runners/test_Vsubstract_runner.c \
+ /var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h \
+ /var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity_internals.h
diff --git a/build/test/out/c/funktion.o b/build/test/out/c/funktion.o
index df5e9a1..ce34c63 100644
Binary files a/build/test/out/c/funktion.o and b/build/test/out/c/funktion.o differ
diff --git a/build/test/out/c/test_Vsubstract.o b/build/test/out/c/test_Vsubstract.o
new file mode 100644
index 0000000..405cddd
Binary files /dev/null and b/build/test/out/c/test_Vsubstract.o differ
diff --git a/build/test/out/c/test_Vsubstract_runner.o b/build/test/out/c/test_Vsubstract_runner.o
new file mode 100644
index 0000000..b4ea47b
Binary files /dev/null and b/build/test/out/c/test_Vsubstract_runner.o differ
diff --git a/build/test/out/test_Akkortrichtsatz.out b/build/test/out/test_Akkortrichtsatz.out
index df09374..4e72097 100755
Binary files a/build/test/out/test_Akkortrichtsatz.out and b/build/test/out/test_Akkortrichtsatz.out differ
diff --git a/build/test/out/test_Anlagenabnutzungsgrad.out b/build/test/out/test_Anlagenabnutzungsgrad.out
index f96859c..96c4b91 100755
Binary files a/build/test/out/test_Anlagenabnutzungsgrad.out and b/build/test/out/test_Anlagenabnutzungsgrad.out differ
diff --git a/build/test/out/test_Anlagenintensitaet.out b/build/test/out/test_Anlagenintensitaet.out
index 80243a1..60a4d8e 100755
Binary files a/build/test/out/test_Anlagenintensitaet.out and b/build/test/out/test_Anlagenintensitaet.out differ
diff --git a/build/test/out/test_Anlagenproduktivitaet.out b/build/test/out/test_Anlagenproduktivitaet.out
index 28ee22b..86ca2b5 100755
Binary files a/build/test/out/test_Anlagenproduktivitaet.out and b/build/test/out/test_Anlagenproduktivitaet.out differ
diff --git a/build/test/out/test_Arbeitsproduktivitaet.out b/build/test/out/test_Arbeitsproduktivitaet.out
index 982d663..be241b3 100755
Binary files a/build/test/out/test_Arbeitsproduktivitaet.out and b/build/test/out/test_Arbeitsproduktivitaet.out differ
diff --git a/build/test/out/test_Cashflow_zu_Gesamtkapital.out b/build/test/out/test_Cashflow_zu_Gesamtkapital.out
index 711f119..44ca89d 100755
Binary files a/build/test/out/test_Cashflow_zu_Gesamtkapital.out and b/build/test/out/test_Cashflow_zu_Gesamtkapital.out differ
diff --git a/build/test/out/test_Dynamische_Amortisationszeit.out b/build/test/out/test_Dynamische_Amortisationszeit.out
index 2ea7bdc..8931cdd 100755
Binary files a/build/test/out/test_Dynamische_Amortisationszeit.out and b/build/test/out/test_Dynamische_Amortisationszeit.out differ
diff --git a/build/test/out/test_Effektivverzinsung.out b/build/test/out/test_Effektivverzinsung.out
index 2015b6f..f5a8e37 100755
Binary files a/build/test/out/test_Effektivverzinsung.out and b/build/test/out/test_Effektivverzinsung.out differ
diff --git a/build/test/out/test_Finanzierungsregeln.out b/build/test/out/test_Finanzierungsregeln.out
index e81450e..fb02c4a 100755
Binary files a/build/test/out/test_Finanzierungsregeln.out and b/build/test/out/test_Finanzierungsregeln.out differ
diff --git a/build/test/out/test_GewinnMaximum.out b/build/test/out/test_GewinnMaximum.out
index 4bec0c8..614a22f 100755
Binary files a/build/test/out/test_GewinnMaximum.out and b/build/test/out/test_GewinnMaximum.out differ
diff --git a/build/test/out/test_Kalkulatorische_Zinsen.out b/build/test/out/test_Kalkulatorische_Zinsen.out
index 2d94df3..16da869 100755
Binary files a/build/test/out/test_Kalkulatorische_Zinsen.out and b/build/test/out/test_Kalkulatorische_Zinsen.out differ
diff --git a/build/test/out/test_Kritische_Menge.out b/build/test/out/test_Kritische_Menge.out
index a577478..6b60323 100755
Binary files a/build/test/out/test_Kritische_Menge.out and b/build/test/out/test_Kritische_Menge.out differ
diff --git a/build/test/out/test_Stueckzeitakkort.out b/build/test/out/test_Stueckzeitakkort.out
index e8ce909..6af110e 100755
Binary files a/build/test/out/test_Stueckzeitakkort.out and b/build/test/out/test_Stueckzeitakkort.out differ
diff --git a/build/test/out/test_Vadd.out b/build/test/out/test_Vadd.out
index 9b02007..cf2bf64 100755
Binary files a/build/test/out/test_Vadd.out and b/build/test/out/test_Vadd.out differ
diff --git a/build/test/out/test_Vaddx2.out b/build/test/out/test_Vaddx2.out
index 451a0ef..e5f1757 100755
Binary files a/build/test/out/test_Vaddx2.out and b/build/test/out/test_Vaddx2.out differ
diff --git a/build/test/out/test_Vaddx3.out b/build/test/out/test_Vaddx3.out
index 7e5c901..73a662d 100755
Binary files a/build/test/out/test_Vaddx3.out and b/build/test/out/test_Vaddx3.out differ
diff --git a/build/test/out/test_Vlength.out b/build/test/out/test_Vlength.out
index 112d052..80b324f 100755
Binary files a/build/test/out/test_Vlength.out and b/build/test/out/test_Vlength.out differ
diff --git a/build/test/out/test_Vshift.out b/build/test/out/test_Vshift.out
index 23d7d7f..ec1f4a9 100755
Binary files a/build/test/out/test_Vshift.out and b/build/test/out/test_Vshift.out differ
diff --git a/build/test/out/test_Vsubstract.out b/build/test/out/test_Vsubstract.out
new file mode 100755
index 0000000..ea5bd7b
Binary files /dev/null and b/build/test/out/test_Vsubstract.out differ
diff --git a/build/test/out/test_Zeitlohn.out b/build/test/out/test_Zeitlohn.out
index 0cf345a..d8058df 100755
Binary files a/build/test/out/test_Zeitlohn.out and b/build/test/out/test_Zeitlohn.out differ
diff --git a/build/test/out/test_angebotserfolg.out b/build/test/out/test_angebotserfolg.out
index 18c5436..dfd9723 100755
Binary files a/build/test/out/test_angebotserfolg.out and b/build/test/out/test_angebotserfolg.out differ
diff --git a/build/test/out/test_eigenkapital_Rentabilitaeten.out b/build/test/out/test_eigenkapital_Rentabilitaeten.out
index 42266c2..4a4ef62 100755
Binary files a/build/test/out/test_eigenkapital_Rentabilitaeten.out and b/build/test/out/test_eigenkapital_Rentabilitaeten.out differ
diff --git a/build/test/out/test_erloesfunktion.out b/build/test/out/test_erloesfunktion.out
index 919c81d..e76439a 100755
Binary files a/build/test/out/test_erloesfunktion.out and b/build/test/out/test_erloesfunktion.out differ
diff --git a/build/test/out/test_gesamtkapital_Rentabilitaeten.out b/build/test/out/test_gesamtkapital_Rentabilitaeten.out
index afeb545..e185682 100755
Binary files a/build/test/out/test_gesamtkapital_Rentabilitaeten.out and b/build/test/out/test_gesamtkapital_Rentabilitaeten.out differ
diff --git a/build/test/out/test_grenzGewinn.out b/build/test/out/test_grenzGewinn.out
index f9de6e4..ce7dc8a 100755
Binary files a/build/test/out/test_grenzGewinn.out and b/build/test/out/test_grenzGewinn.out differ
diff --git a/build/test/out/test_marktanteil.out b/build/test/out/test_marktanteil.out
index 3966393..dd9e192 100755
Binary files a/build/test/out/test_marktanteil.out and b/build/test/out/test_marktanteil.out differ
diff --git a/build/test/out/test_trapezFlaeche.out b/build/test/out/test_trapezFlaeche.out
index 37e6ad8..197cf12 100755
Binary files a/build/test/out/test_trapezFlaeche.out and b/build/test/out/test_trapezFlaeche.out differ
diff --git a/build/test/preprocess/files/test_Vsubstract.c b/build/test/preprocess/files/test_Vsubstract.c
new file mode 100644
index 0000000..6e1b9f7
--- /dev/null
+++ b/build/test/preprocess/files/test_Vsubstract.c
@@ -0,0 +1,39 @@
+#include "src/funktion.h"
+#include "/var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h"
+
+
+void setUp(void)
+
+{
+
+}
+
+
+
+void tearDown(void)
+
+{
+
+}
+
+
+
+void test_Vsubstract_NeedToImplement(void)
+
+{
+
+    double x1 = 234;
+
+    double z1 = 12;
+
+    double exp = Vsubstract(x1,z1);
+
+    double result = 222;
+
+    UnityAssertFloatsWithin((UNITY_FLOAT)((UNITY_FLOAT)((result)) * (UNITY_FLOAT)(0.00001f)), (UNITY_FLOAT)((UNITY_FLOAT)((result))), (UNITY_FLOAT)((UNITY_FLOAT)((exp))), ((
+
+   ((void *)0)
+
+   )), (UNITY_UINT)((UNITY_UINT)(18)));
+
+}
diff --git a/build/test/preprocess/includes/test_Vsubstract.c b/build/test/preprocess/includes/test_Vsubstract.c
new file mode 100644
index 0000000..4e923ea
--- /dev/null
+++ b/build/test/preprocess/includes/test_Vsubstract.c
@@ -0,0 +1,3 @@
+---
+- "/var/lib/gems/3.0.0/gems/ceedling-0.31.1/vendor/unity/src/unity.h"
+- src/funktion.h
diff --git a/build/test/results/test_Akkortrichtsatz.pass b/build/test/results/test_Akkortrichtsatz.pass
index 0d10c35..6979f91 100644
--- a/build/test/results/test_Akkortrichtsatz.pass
+++ b/build/test/results/test_Akkortrichtsatz.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 552.000000
-:time: 0.0010892499999499705
+:time: 0.00284315900034926
diff --git a/build/test/results/test_Anlagenabnutzungsgrad.pass b/build/test/results/test_Anlagenabnutzungsgrad.pass
index 8e8e639..90cafdf 100644
--- a/build/test/results/test_Anlagenabnutzungsgrad.pass
+++ b/build/test/results/test_Anlagenabnutzungsgrad.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 60.000000
-:time: 0.0015246739999383863
+:time: 0.0017979529998228827
diff --git a/build/test/results/test_Anlagenintensitaet.pass b/build/test/results/test_Anlagenintensitaet.pass
index 3778a12..63bb3fe 100644
--- a/build/test/results/test_Anlagenintensitaet.pass
+++ b/build/test/results/test_Anlagenintensitaet.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 4878.048780
-:time: 0.004912790000162204
+:time: 0.0018660270002328616
diff --git a/build/test/results/test_Anlagenproduktivitaet.pass b/build/test/results/test_Anlagenproduktivitaet.pass
index c529228..7c3559a 100644
--- a/build/test/results/test_Anlagenproduktivitaet.pass
+++ b/build/test/results/test_Anlagenproduktivitaet.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 18.203304
-:time: 0.0019584779997785517
+:time: 0.003302960999917559
diff --git a/build/test/results/test_Arbeitsproduktivitaet.pass b/build/test/results/test_Arbeitsproduktivitaet.pass
index 6b217df..5759e9a 100644
--- a/build/test/results/test_Arbeitsproduktivitaet.pass
+++ b/build/test/results/test_Arbeitsproduktivitaet.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 60.000000
-:time: 0.003153232999920874
+:time: 0.0025968250001824345
diff --git a/build/test/results/test_Cashflow_zu_Gesamtkapital.pass b/build/test/results/test_Cashflow_zu_Gesamtkapital.pass
index 700edf0..17bf8bf 100644
--- a/build/test/results/test_Cashflow_zu_Gesamtkapital.pass
+++ b/build/test/results/test_Cashflow_zu_Gesamtkapital.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 0.158038
-:time: 0.0012962870000592375
+:time: 0.00600076499995339
diff --git a/build/test/results/test_Dynamische_Amortisationszeit.pass b/build/test/results/test_Dynamische_Amortisationszeit.pass
index 8ebbdfb..fb97d66 100644
--- a/build/test/results/test_Dynamische_Amortisationszeit.pass
+++ b/build/test/results/test_Dynamische_Amortisationszeit.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 189.421906
-:time: 0.0015471010001419927
+:time: 0.0034359699998276483
diff --git a/build/test/results/test_Effektivverzinsung.pass b/build/test/results/test_Effektivverzinsung.pass
index 0e32e4e..dbe76d0 100644
--- a/build/test/results/test_Effektivverzinsung.pass
+++ b/build/test/results/test_Effektivverzinsung.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 16.034390
-:time: 0.0016315079997184512
+:time: 0.0012796930000149587
diff --git a/build/test/results/test_Finanzierungsregeln.pass b/build/test/results/test_Finanzierungsregeln.pass
index c45530c..7ee0a4b 100644
--- a/build/test/results/test_Finanzierungsregeln.pass
+++ b/build/test/results/test_Finanzierungsregeln.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 0.051041
-:time: 0.0016992800001389696
+:time: 0.002194540999880701
diff --git a/build/test/results/test_GewinnMaximum.pass b/build/test/results/test_GewinnMaximum.pass
index 73bfc31..b05cb02 100644
--- a/build/test/results/test_GewinnMaximum.pass
+++ b/build/test/results/test_GewinnMaximum.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 251.000000
-:time: 0.0022883710003043234
+:time: 0.0012753200003317033
diff --git a/build/test/results/test_Kalkulatorische_Zinsen.pass b/build/test/results/test_Kalkulatorische_Zinsen.pass
index f1eba6c..9e5aace 100644
--- a/build/test/results/test_Kalkulatorische_Zinsen.pass
+++ b/build/test/results/test_Kalkulatorische_Zinsen.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 1.440000
-:time: 0.003428260999953636
+:time: 0.0017578430001776724
diff --git a/build/test/results/test_Kritische_Menge.pass b/build/test/results/test_Kritische_Menge.pass
index 5068103..7f1b8c6 100644
--- a/build/test/results/test_Kritische_Menge.pass
+++ b/build/test/results/test_Kritische_Menge.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss -12.096026
-:time: 0.002277903000049264
+:time: 0.0011726940001608455
diff --git a/build/test/results/test_Stueckzeitakkort.pass b/build/test/results/test_Stueckzeitakkort.pass
index f60f18e..c406bce 100644
--- a/build/test/results/test_Stueckzeitakkort.pass
+++ b/build/test/results/test_Stueckzeitakkort.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - '96600.000000'
-:time: 0.0044668549999187235
+:time: 0.002043018999756896
diff --git a/build/test/results/test_Vadd.pass b/build/test/results/test_Vadd.pass
index 99515a4..80bca0d 100644
--- a/build/test/results/test_Vadd.pass
+++ b/build/test/results/test_Vadd.pass
@@ -15,4 +15,4 @@
   :failed: 0
   :ignored: 0
 :stdout: []
-:time: 0.0013063500000498607
+:time: 0.0018238259999634465
diff --git a/build/test/results/test_Vaddx2.pass b/build/test/results/test_Vaddx2.pass
index ba44eb7..6ee20ec 100644
--- a/build/test/results/test_Vaddx2.pass
+++ b/build/test/results/test_Vaddx2.pass
@@ -15,4 +15,4 @@
   :failed: 0
   :ignored: 0
 :stdout: []
-:time: 0.001610672000424529
+:time: 0.001539509999929578
diff --git a/build/test/results/test_Vaddx3.pass b/build/test/results/test_Vaddx3.pass
index 976837d..0c71cff 100644
--- a/build/test/results/test_Vaddx3.pass
+++ b/build/test/results/test_Vaddx3.pass
@@ -15,4 +15,4 @@
   :failed: 0
   :ignored: 0
 :stdout: []
-:time: 0.0018272040001647838
+:time: 0.0021386270000220975
diff --git a/build/test/results/test_Vlength.pass b/build/test/results/test_Vlength.pass
index e013b8f..07a987b 100644
--- a/build/test/results/test_Vlength.pass
+++ b/build/test/results/test_Vlength.pass
@@ -15,4 +15,4 @@
   :failed: 0
   :ignored: 0
 :stdout: []
-:time: 0.002185852999900817
+:time: 0.0016146680000019842
diff --git a/build/test/results/test_Vshift.pass b/build/test/results/test_Vshift.pass
index c09dc27..a8d549a 100644
--- a/build/test/results/test_Vshift.pass
+++ b/build/test/results/test_Vshift.pass
@@ -15,4 +15,4 @@
   :failed: 0
   :ignored: 0
 :stdout: []
-:time: 0.0051865289997294894
+:time: 0.0013186559999667224
diff --git a/build/test/results/test_Vsubstract.pass b/build/test/results/test_Vsubstract.pass
new file mode 100644
index 0000000..b20cad5
--- /dev/null
+++ b/build/test/results/test_Vsubstract.pass
@@ -0,0 +1,19 @@
+---
+:source:
+  :path: test
+  :file: test_Vsubstract.c
+:successes:
+- :test: test_Vsubstract_NeedToImplement
+  :line: 12
+  :message: ''
+  :unity_test_time: 0
+:failures: []
+:ignores: []
+:counts:
+  :total: 1
+  :passed: 1
+  :failed: 0
+  :ignored: 0
+:stdout:
+- "(222.000000: "
+:time: 0.001748634000250604
diff --git a/build/test/results/test_Zeitlohn.pass b/build/test/results/test_Zeitlohn.pass
index 3ba8620..64fcd54 100644
--- a/build/test/results/test_Zeitlohn.pass
+++ b/build/test/results/test_Zeitlohn.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 3450.000000
-:time: 0.002940536000096472
+:time: 0.0017543049998494098
diff --git a/build/test/results/test_angebotserfolg.pass b/build/test/results/test_angebotserfolg.pass
index 2055d57..a68f8f8 100644
--- a/build/test/results/test_angebotserfolg.pass
+++ b/build/test/results/test_angebotserfolg.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 225.000000
-:time: 0.0018840409998119867
+:time: 0.0012654539996219683
diff --git a/build/test/results/test_eigenkapital_Rentabilitaeten.pass b/build/test/results/test_eigenkapital_Rentabilitaeten.pass
index 6f1c2e7..9bb3eeb 100644
--- a/build/test/results/test_eigenkapital_Rentabilitaeten.pass
+++ b/build/test/results/test_eigenkapital_Rentabilitaeten.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 62.500000
-:time: 0.00125848399966344
+:time: 0.002084077000290563
diff --git a/build/test/results/test_erloesfunktion.pass b/build/test/results/test_erloesfunktion.pass
index 3957df9..085aa40 100644
--- a/build/test/results/test_erloesfunktion.pass
+++ b/build/test/results/test_erloesfunktion.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 4000.000000
-:time: 0.0012494999996306433
+:time: 0.001397080999595346
diff --git a/build/test/results/test_gesamtkapital_Rentabilitaeten.pass b/build/test/results/test_gesamtkapital_Rentabilitaeten.pass
index c08a4e3..eac66de 100644
--- a/build/test/results/test_gesamtkapital_Rentabilitaeten.pass
+++ b/build/test/results/test_gesamtkapital_Rentabilitaeten.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 27.136929
-:time: 0.002011271999890596
+:time: 0.0013913920001868973
diff --git a/build/test/results/test_grenzGewinn.pass b/build/test/results/test_grenzGewinn.pass
index 7353e7a..3ecfdae 100644
--- a/build/test/results/test_grenzGewinn.pass
+++ b/build/test/results/test_grenzGewinn.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 1141.000000
-:time: 0.0013196279996918747
+:time: 0.0015794790001564252
diff --git a/build/test/results/test_marktanteil.pass b/build/test/results/test_marktanteil.pass
index 18475d2..7745064 100644
--- a/build/test/results/test_marktanteil.pass
+++ b/build/test/results/test_marktanteil.pass
@@ -16,4 +16,4 @@
   :ignored: 0
 :stdout:
 - Testergebniss 21.739130
-:time: 0.002347449000353663
+:time: 0.002600754000013694
diff --git a/build/test/results/test_trapezFlaeche.pass b/build/test/results/test_trapezFlaeche.pass
index 1198d75..c18c7f6 100644
--- a/build/test/results/test_trapezFlaeche.pass
+++ b/build/test/results/test_trapezFlaeche.pass
@@ -17,4 +17,4 @@
 :stdout:
 - 'Flaeche vom Trapez beträgt: 21.000000'
 - Testergebniss 21.000000
-:time: 0.00203405100000964
+:time: 0.0012447700000848272
diff --git a/build/test/runners/test_Vsubstract_runner.c b/build/test/runners/test_Vsubstract_runner.c
new file mode 100644
index 0000000..a704ddf
--- /dev/null
+++ b/build/test/runners/test_Vsubstract_runner.c
@@ -0,0 +1,81 @@
+/* AUTOGENERATED FILE. DO NOT EDIT. */
+
+/*=======Automagically Detected Files To Include=====*/
+#include "unity.h"
+
+int GlobalExpectCount;
+int GlobalVerifyOrder;
+char* GlobalOrderError;
+
+/*=======External Functions This Runner Calls=====*/
+extern void setUp(void);
+extern void tearDown(void);
+extern void test_Vsubstract_NeedToImplement(void);
+
+
+/*=======Mock Management=====*/
+static void CMock_Init(void)
+{
+  GlobalExpectCount = 0;
+  GlobalVerifyOrder = 0;
+  GlobalOrderError = NULL;
+}
+static void CMock_Verify(void)
+{
+}
+static void CMock_Destroy(void)
+{
+}
+
+/*=======Test Reset Options=====*/
+void resetTest(void);
+void resetTest(void)
+{
+  tearDown();
+  CMock_Verify();
+  CMock_Destroy();
+  CMock_Init();
+  setUp();
+}
+void verifyTest(void);
+void verifyTest(void)
+{
+  CMock_Verify();
+}
+
+/*=======Test Runner Used To Run Each Test=====*/
+static void run_test(UnityTestFunction func, const char* name, UNITY_LINE_TYPE line_num)
+{
+    Unity.CurrentTestName = name;
+    Unity.CurrentTestLineNumber = line_num;
+#ifdef UNITY_USE_COMMAND_LINE_ARGS
+    if (!UnityTestMatches())
+        return;
+#endif
+    Unity.NumberOfTests++;
+    UNITY_CLR_DETAILS();
+    UNITY_EXEC_TIME_START();
+    CMock_Init();
+    if (TEST_PROTECT())
+    {
+        setUp();
+        func();
+    }
+    if (TEST_PROTECT())
+    {
+        tearDown();
+        CMock_Verify();
+    }
+    CMock_Destroy();
+    UNITY_EXEC_TIME_STOP();
+    UnityConcludeTest();
+}
+
+/*=======MAIN=====*/
+int main(void)
+{
+  UnityBegin("test_Vsubstract.c");
+  run_test(test_Vsubstract_NeedToImplement, "test_Vsubstract_NeedToImplement", 12);
+
+  return UnityEnd();
+}
diff --git a/test/test_Vsubstract.c b/test/test_Vsubstract.c
new file mode 100644
index 0000000..b8fde48
--- /dev/null
+++ b/test/test_Vsubstract.c
@@ -0,0 +1,19 @@
+#include "unity.h"
+#include "funktion.h"
+
+void setUp(void)
+{
+}
+
+void tearDown(void)
+{
+}
+
+void test_Vsubstract_NeedToImplement(void)
+{
+    double x1 = 234;
+    double z1 = 12;
+    double exp = Vsubstract(x1,z1);
+    double result = 222;
+    TEST_ASSERT_EQUAL_FLOAT(result,exp);
+}
\ No newline at end of file